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

<passage>:
I was killing an hour in the billiard room of the Spacemen's Club in Swamp City when the Venusian bellboy came and tapped me on the shoulder. "Beg pardon, thir," he said with his racial lisp, "thereth thome one to thee you in the main lounge." His eyes rolled as he added, "A lady!" A woman here...! The in-coming pilots and crewmen could relax before leaving for another voyage. The rule that no females could pass its portals was strictly enforced. I followed the bellhop down the long corridor that led to the main lounge. At the threshold I jerked to a halt and stared incredulously. Grannie Annie! calm defiance. I barged across the lounge and seized her hand. "Grannie Annie! I haven't seen you in two years." "Hi, Billy-boy," she greeted calmly. "Will you please tell this fish-face to shut up." The desk clerk went white. "Mithter Trenwith, if thith lady ith a friend of yourth, you'll have to take her away. It'th abtholutely againth the ruleth...." "Okay, okay," I grinned. "Look, we'll go into the grille. There's no one there at this hour." In the grille an equally astonished waiter served us—me a lime rickey "Hold it, Billy-boy." Laughingly she threw up both hands. "Sure, I knew your hero fall in love with a bug-eyed monster." Up on the wall a clock chimed the hour. The old woman jerked to her feet. "I almost forgot, Billy-boy. I'm due at the Satellite Theater in ten Before I realized it, I was following her through the lounge and out to In front was a big sign. It read: ONE NIGHT ONLY THE QUESTION PROGRAM OF THE SYSTEM As we strode down the aisle a mangy-looking Venusian began to pound a stage steps and disappeared in the wings. improved pantascope panel and switchboard. Before each set stood an Earthman operator. A tall man, clad in a claw-hammer coat, came out from the wings and advanced to the footlights. "People of Swamp City," he said, bowing, "permit me to introduce Satellite audience. When it had subsided, the man continued: "As most of you are familiar with our program, it will be unnecessary to give any advance explanation. I will only say that on this stage are These questions, my nine experts will endeavor to answer. For every question missed, the sender will receive a check for one thousand planetoles . "One thing more. As usual we have with us a guest star who will match The Doctor's program began. The operator of the Earth visi twisted his dials and nodded. Blue light flickered on the pantascope panel to coalesce slowly into the face of a red-haired man. Sharp and dear his voice echoed through the theater: " Doctor Universe nodded and turned to Grannie Annie who had raised her hand. She said quietly: "Charles Zanner in the year 2012. In a specially constructed tracto-car." And so it went. Questions from Mars, from Earth, from Saturn flowed in or when the Truthicator flashed a red light, he announced the name of the winner. It grew a little tiresome after a while and I wondered why Grannie had brought me here. And then I began to notice things. The audience in the Satellite signal of Doctor Universe. The spell created by the man was complete. Pompous and erect, he strode back and forth across the stage like a general surveying his army. His black eyes gleamed, and his thin lips were turned in a smile of satisfaction. When the last question had been answered I joined the exit-moving crowd. It was outside under the street marquee that a strange incident occurred. A yellow-faced Kagor from the upper Martian desert country shuffled by, dragging his cumbersome third leg behind him. Kagors, of course, had an and led me around a corner and through a doorway under a sign that read was all but deserted. "Billy-boy, did you see the way that crowd acted?" Karn...." "Who?" I interrupted. "An old prospector who lives out in the deep marsh on the outskirts of Varsoom country. To make a long story short, I got him talking about asked abruptly. I shook my head. "Some new kind of ..." "To go back to my first trip to Venus. As I said, I met Ezra Karn, an old prospector there in the marsh. Karn told me that on one of his approaching danger. "Let's get out of here," I said, getting up. Grannie Annie leaped to her feet, grasped my arm and raced for the An instant later we were plunging through the dark night. steadily. And the news broadcast I had heard over the portable visi representative government be abolished, but a forum was now being held to find a leader who might take complete dictatorial control. Outside a whisper-worm hissed softly. I got up and strode out of my Abruptly I stiffened. The familiar drone of the marsh was gone. In its place a ringing silence blanketed everything. undulating sweeps toward the center of the camp. Fascinated, I watched missing the thing by the narrowest of margins. From the tent opposite a gaunt figure clad in a familiar dress appeared. Grannie gave a single warning: "Stand still!" "Then that would mean...?" "That it was sent by our enemy, the same enemy that shot at us in the cafe in Swamp City. Exactly." Grannie Annie halted at the door of her tent and faced me with earnest eyes. "Billy-boy, our every move is a matter of seconds. At high noon by my Earth watch I sighted a low white structure on one of the distant islands. Moments later we made a landing at a rude jetty, and Grannie Annie was introducing me to Ezra Karn. He was not as old a man as I had expected, but he was ragged and unkempt with iron gray hair falling almost to his shoulders. He was cloth, the Venus equivalent of buckskin, and on his head was an enormous flop-brimmed hat. "Glad to meet you," he said, shaking my hand. "Any friend of Miss Flowers is a friend of mine." He ushered us down the catwalk into his hut. The place was a two room affair, small but comfortable. The latest Food supplies and fresh drinking water were replenished at the hut. Several mold guns were borrowed from the prospector's supply to arm the Venusians. And then as we were about to leave, Karn suddenly turned. "The Doctor Universe program," he said. "I ain't missed one in months. You gotta wait 'til I hear it." It was the same show I had witnessed back in Swamp City. Once again I heard questions filter in from the far outposts of the System. Once again I saw the commanding figure of the quiz master as he strode back despondency beset our entire party. I caught myself musing over the futility of the venture. Only the pleadings of Grannie Annie kept me from turning back. On the morrow I realized the truth in her warning, steaming swamp.... But at length we reached firm ground and began our advance on foot. It was Karn who first sighted the ship. Striding in the lead, he suddenly halted at the top of a hill and leveled his arm before him. There it lay, a huge cigar-shaped vessel of blackened Grannie gazed a long moment through binoculars. "Billy-boy, take three The silence remained absolute. We reached the door and pulled it open. There was no sign of life. "Somebody's gone to a lot of trouble here," Ezra Karn observed. Somebody had. Before us stretched a narrow corridor, flanked on the

<question>:
Why was Billy-boy stopped as he was walking into the main lounge?

<options>:
A He was not welcome in the club, per recent events.
B He was no longer a pilot and had to return to the gate.
C The pilots and crew-men were requested to all meet before entering
D He was informed that he had a visitor

<answer>:

D