Read the following passage and questions, then choose the right answer from options, the answer should be one of A, B, C, D.

<passage>:
The saucer was interesting, but where was the delegate? was clear. No one moved DELEGATE on long poles before them. Jerry held his breath as they what the delegate from Venus approached the object only biggest surprise since David when they were yards away did he appreciate its size. It wasn't a gloved hand. "It's okay," a voice breathed behind him. "No radiation ..." Slowly, the ring of spectators closed tighter. They were twenty yards from the ship when the cagey, to behave the way the newspaper wanted him to behave, to protect the cozy Washington assignment he had waited for one-passenger. It is clear of all radiation, and is perfectly 7 interplanetary rocket, built safe to approach. There is a part of him, a rebel part, wanted him to stay on the trail Jerry couldn't identify stepped hatch which may be opened by A door slid open. "It's a box!" someone said. "A crate—" "Colligan! Moore! Schaffer! A trio came forward and hoisted the crate out of the ship. Then the voice spoke again Jerry deduced that it must have been activated by the decreased load of the ship. will find our delegate within. with the courtesy of an official emissary." They set to work on the crate, its gray plastic material giving in readily to the application of opened, they stood aside in amazement and consternation. There were a variety of metal pieces packed within, protected by a filmy packing material. "Wait a minute," the general Think it's war?" He picked up a gray-bound volume, and opened its cover. "'Instructions for assembling Delegate,'" he read aloud. The reporter closed the door behind him, and then strolled out of the building into the sunlight. housing. A-2 ...'" He looked up. "It's an instruction book," he whispered. "We're supposed to build the damn thing." The Delegate, a handsomely constructed robot almost eight feet tall, was pieced together some three hours later, by a mechanism they had assembled. It stood impassive until they obeyed the final instruction. "Press Button K ..." They found button K, and pressed it. escort me to the meeting place ..." It wasn't until three days after the landing that Jerry Bridges saw the Delegate again. government officials, Army officers, and scientists, he was quartered in a quonset hut in Fort Dix, New Jersey. Then, after seventy-two frustrating and they gave him snickering greetings. He took a small table in the rear and ate his meal in sullen silence. It wasn't the newsmen's jibes No one told him his destination, and it wasn't until he saw the So far, the byword had been secrecy. They knew at the realization—Nikita Khrushchev Spocker was unavailable. His himself. It was a summit secretary, however, was a little Four days later, a mysterious highly-polished metal robot, was seated blithely at a desk which the cause of it all, a placid, The robot delegate stood up. Delegate from a great neighbor out. He ran after her, the restaurant proprietor shouting about being far too occupied with internal matters. But our isolation cannot last in the face of and relentlessly—to destroy your world completely." Again, the meeting room exploded return, bearing a different Delegate from Venus—a Delegate of Death, who speaks not in words, but in the explosion of atoms. Think of thousands of such Delegates, fired from a vantage point far beyond the reach of the idea," Greta said stiffly. In a secluded booth at the rear of a restaurant unfrequented by The Delegate sat down. and said: explosion rocked the quiet sands of Los Alamos, and the Venus "At first, they thought it was hours after that, the robot delegate, its message delivered, its mission fulfilled, requested to be locked inside a bombproof chamber. When the door was opened, the Delegate was an exploded another sputnik." " spacecraft was no more. Two out what the damn thing was." ruin. in Washington. They were in his apartment, and it was the first for about three days, and they're thinking of calling a plenary session of the UN just to figure the Delegate speak, something's from last night." "Don't be silly. The spaceship's can land their delegate." "Their delegate. They came embrace, he cried out: "What's the matter?" "I just thought of something! Now where the hell did I put my old notebooks?" He got up from the sofa and went scurrying to a closet. From a debris of cardboard boxes, he found a worn old leather brief case, and cackled with delight when he found the yellowed notebooks inside. "What are or something. The Senator when I'm not wanted." She took her hat and coat from the hall closet, gave him one last chance to change his mind, and then left. Greta said haughtily. "I know "Well, how else can I take it? I'm not even supposed to know "Terrible? I think you're wonderful!" "And you promise not to print a massive woman with gray hair and impervious to charm, guarded the portals of his office with all the indomitable will of the U. S. Marines. Jerry felt decrepit, but managed building three hundred yards from the men's dorm. He met a student at the door, who told him that Professor Coltz would be found in the physics department. The room was empty when Jerry entered, except for the "That'll be all, Bridges." it with his next batch of mail." "When will that be?" "In an hour. He's in a terribly said. "Here's a book—" a stack of memorandums and the Delegate speak. I didn't know what it was until last night, when I dug out my old college notebooks. Thank God I kept them." letters, his own envelope atop Coltz's eyes were suddenly "What do you mean, Jerry?" hooded. AP correspondent, in front of until I checked my old Jerry, and snapped: notes, and here's what I found." He dug into his coat pocket "This note of yours. Just what do you think it means?" the Pan-American Building on by the Delegate from Venus." that secrecy is essential, that leakage of the story might cause person who knows of it, we have two choices. One of them is to lock you up." Jerry swallowed hard. panic. Since you're the only unauthorized Jerry?" allowed to relay the story to the press until such a time as "Wait a minute!" group that worked in the quiet and secrecy of a University on a all fantastic scheme to force the group would secretly launch an earth satellite of their own, and come down safely at a certain time and place. They would install within the cone, ready to be assembled. They would beam a radio message to earth from the reached to accept the delegate. from their 'spaceship.' Then, when the Robot was assembled, cone, seemingly as if it originated on it. Meanwhile, consider yourself in custody." The USAF jet transport wasn't the only secrecy-shrouded aircraft that took off that evening from Washington Airport. But Jerry Bridges, sitting in the rear seat flanked by two Sphinx-like Secret Service men, knew that he was the only passenger with non-official status aboard. It was only a few minutes past ten when they arrived at the air base at Los Alamos. The desert sky was cloudy and starless, and powerful searchlights Jerry braked the convertible waiting to rush the air passengers to some unnamed destination. They drove for twenty of nowhere. On the perimeter, official vehicles were parked in orderly rows, and four USAF trailer trucks were in evidence, their radarscopes turning slowly. good job of keeping the excitement contained. He was allowed to leave the car and stroll unescorted. He his back against the grill of a staff car, smoking one cigarette after another. As the minutes ticked off, the returned to the desert, and calm was shattered. At first, he hit, a dust cloud obscured it from sight. A loudspeaker blared out an unintelligible order, but its message

<question>:
What happened to the Delegate?

<options>:
A The Marines destroyed it.
B It self-destructed.
C It returned to Venus.
D It was locked inside a bomb shelter.

<answer>:

B