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

<passage>:
laid an egg in New York harbor, Abner Longmans ("One-Shot") Braun was in the city back in '52? They scrabbled for them for a year and never pulled up a one they finally had to warn the public going about his normal business, which was making another million the deals he was trying to make. From every point of view it was a bad week end for the CIA to mix into his affairs, but nobody had explained that to the master of the storyteller, an organization like Civilian Intelligence Associates gets to all its facts backwards, entering the tale at the pay-off, working back to the hook, and winding up with a sheaf of background facts to feed into the computer for Next Time. It's that their plotting has already been done for them—but it's inherent in the way we operate, and there it is. Certainly nobody at CIA so much as thought of Braun when the news first came through. Harry Anderton, the messenger had been fast, and the gambler hadn't bothered to read identifying the egg this was when our records show us officially entering the affair, but, of course, Anderton had been keeping the wires to what a college student had thought won't make that much difference. How did you find out about this egg in the first place?" "The automatic compartment bulkheads opened his mouth that One-Shot egg was buried among a lot of other crates in the dump-cell of the hold—" something out in the harbor. We don't know what it is. It may be a hell-bomb, or it may be just somebody's old laundry. Obviously we've got to find out which—and we want you to tell us." "All right," I said. "Go ahead." up. "Me? Hell, Andy, I don't know nothing about things like that. I'm surprised with you. I thought CIA "Well, there was a timer on the dump-cell floor, set to drop the egg had all the brains it needed—ain't you got machines to tell you answers Dr. Hadamard. Can't even tell its Harbor Patrol found the dump-cell open, they called us in." "I see." I thought about it a moment. know whether the laid an egg or not." "That's what I keep trying to explain to you, Dr. Harris. We don't know what she dropped and we haven't any way of finding out. It could be a bomb—it could be anything. We're sweating everybody on "Nothing, Dr. Hadamard. Could that none of them know anything board the ship now, but it's my guess the whole procedure was designed to "Right." He sounded relieved. Official people have a lot of confidence in CIA CIA had been started the same way, by a loose corporation of universities and industries all of which had no one of which had had the money to buy one for itself. The Eisenhower administration, with its emphasis CIA. I buzzed for two staffers, and in five minutes got Clark Cheyney and Joan Hadamard, CIA's business manager and social science division chief respectively. The titles were almost should have guessed it, but it had never occurred to me. to the present. "All right," he said. "I told you the truth, Andy. Remember that. So—is it a bomb or ain't it? That's what's up for grabs, right?" I nodded. He closed his eyes. An and characterless. "Hello, out there in the harbor. This is CIA, Harris calling. Come in, please." "Monig here," the audio said. "All right," he said. "You guys wanted it this way. I say it's a bomb. " He stared at us for a moment more—and "Not a thing, Dr. Harris," Monig heard him come in. "But that doesn't prove anything. The egg might have carried sufficient shielding in itself. Or maybe the Commies didn't care "Unscrew the cap?" the audio that sets it off—" "It won't go off. That's the one squawked. "But Dr. Hadamard, if thing you can be sure it won't do." whether the crew was exposed or not. Or maybe there isn't any egg." "We're getting plenty of radiation now. Just a minute— Yeah. Dr. Hadamard, it's a bomb, all right. But it hasn't got a fuse. Now how could they have made a fool mistake like that?" phone down again. "Are you going to duck out just like that? Remember, Dr. Harris, we've got to evacuate the city first of all! No matter whether it's a real egg or not—we can't take said. "That's right, a dud." being an egg!" "Don't move a man until you get a go-ahead from CIA," I said. "For all we know now, evacuating the city may be just what the enemy wants us It was too good a chance for us to test how our facilities would stand up in a real bomb-drop." "A real drop?" Anderton said. "Are you trying to say that CIA staged this? You ought to be shot, the whole pack of you!" "No, not exactly," I said. "The enemy's responsible for the drop, all right. We got word last month from our man in Gdynia that they were going to do it, and that the bomb would be on board the to do—so they can grab it unharmed. when you hired us," I pointed out. "If you want to evacuate without our to miss. We wanted to find out just how long it would take us to figure out the nature of the bomb—which we didn't know in detail—after it was dropped here. So we had our people in Gdynia defuse the thing right on the button as far as it went. We didn't ask you whether or not that object was a live bomb. We asked whether it was a bomb or not. You said it was, and you were right." The expression on Braun's face had been dropped. If we had still failed to establish that when the with all the attendant risk that that was exactly what the enemy wanted us to do." "So?" "So we failed the test," I said. "At one minute short of the deadline, Joan had the divers unscrew the cap. In a real drop that would have resulted in a detonation, if the bomb was real we'd never risk it. That a better insight into how the union to what he had told the "And that means that you were the only person who did come through, Mr. Braun. If a real bomb-drop ever comes, we're going to have O.K., you'll have to fire us first. It'll our investigation. Your intuition for the one-shot gamble was the one thing that bailed us out this time. to have you here, as an active part of Next time it may save eight million or later they crack trying to appease it." August 1955. Extensive research did not uncover any evidence that the U.S. so much as pulled the rope to raise the curtain." most uneducated, power-driven men, now I need another favor—something right up your alley." "CIA business?" "Yes. I didn't know you knew I was with CIA." Braun chuckled. "I still know a thing or two," he said. "What's the "That I can't tell you over the an expert. Can you come down to CIA's central headquarters right away?" "Yeah, if it's that big. If it ain't, "You'll get it," I said. "Thanks, Mr. Braun." I called headquarters and sent a messenger to my apartment to look for one of those long-dusty blue folders them, with orders to scorch it over to Braun without stopping to breathe "Not quite. I've got something, if I can just figure out what it is. Remember One-Shot Braun?" "Yes. What's he got to do with it?" from a foundation of even deeper black. "Is that operation getting you anywhere?" Anderton interjected harshly. "We don't even know if that's the egg—the whole area is littered with crates. Harris, you've got to let me get that alert out!"

<question>:
What do Dr. Harris and Dr. Hadamard know that the others don’t know?

<options>:
A Braun is being framed.
B The bomb has already been defused.
C There is no bomb.
D The CIA planted the bomb.

<answer>:

B