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

<passage>:
Red Witch of Mercury By EMMETT McDOWELL Death was Jaro Moynahan's stock in trade, and Mercury, he was selling his guns into the weirdest of all his exploits—gambling his life against the soft touch of a woman's lips. down about her face. There was perspiration on her upper lip and temples. Her crimson mouth wore a fixed smile. Her eyes were frightened. The man, who had accompanied the singer on the piano, sat at the foot "So," said the red-head locate Karfial Hodes. Don't look at me that way, Jaro. You frighten me. I'm telling the truth. We can't find him. That's why we called you. You've got to find him, Jaro. He's stirring up all Mercury." "Who's putting up the money?" "I can't tell you." "Why? What makes you think that?" to lose most in case of a revolution? The answer seemed obvious enough. so, he suspected that they had caught a tartar. The Red Witch had the reputation of being able to take care of herself. He beckoned a waiter, paid his bill. As the Mercurian started to leave, "What became of the red-headed singer?" engineered it in the dark and the Mercurians were a clannish lot. Back on the narrow alley-like street Jaro Moynahan headed for his followers. Once back in his room, Jaro Moynahan stripped off his clothes, unbuckled a shoulder holster containing a compressed air slug gun, stepped under the shower. His body was lean and brown as his face stretching out on the bed began to contemplate his toes with singular interest. He had, he supposed, killed rather a lot of men. He had fought in was little doubt but that he had killed quite a number of men. But this business of hunting a man through the rat-runs beneath the city was out Jaro still said nothing. Miss Mikail must be the red-headed singer, Mikail's abduction fifteen minutes after the fact." Jaro raised his eyebrows. "Perhaps then you know where she is?" Mr. Peet shook his head. "No. Karfial Hodes' men abducted her." "They told me Mr. Peet was here," he said. "It's for you," said Jaro over his shoulder. Mr. Peet came to the door. "Hello, Stanley. I thought Hodes had you? Where's Miss Mikail?" "I got away. Look, Mr. Peet, I got to see you alone." seldom shot to kill, it stopped a man like a well placed mule's hoof. He adjusted the gun lightly in its holster in order that it wouldn't stick if he were called upon to use it in a hurry. Then he went out then quite clearly he heard Albert Peet say in a high girlish tone: "Stanley, I thought I left you in the native quarter. Why did you follow me? How many times have I told you never to come here?" The reply was unintelligible. Then the pale-faced young man came Moynahan he froze. "What're you sneaking around here for?" The youth's black eyes were hot as coals, his fingers twitching. His hands began to creep upward. "You dirty ..." he began, but he got no further. Jaro Moynahan shot him in the shoulder. The compressed air slug gun had seemed to leap into Jaro's hand. The hurled him against the wall. Jaro vaulted the rail, deftly relieved him of two poisoned needle guns. "I'll get you for this," said Stanley, his mouth twisted in pain. "You've broken my shoulder. I'll kill you." The door to the inner sanctum swung open. "What's happened?" cried Albert Peet in distress. "What's wrong with you, Stanley?" "This dirty slob shot me in the shoulder." "But how badly?" Peet was wringing his hands. "Stanley," said Mr. Peet. "You're bleeding all over my carpet. Why can't you go in the washroom. There's a tile floor in there. If you hadn't disobeyed this wouldn't have happened. You and your fights. Has anyone called a doctor? Where's Miss Webb? Miss Webb! Oh, Miss Webb! That girl. Miss Webb!" Stanley climbed to his feet, swayed a moment drunkenly, then wobbled out a door on the left just as a tall brunette hurried in from the right. She had straight black hair which hung not quite to her "You trollop." Mr. Peet regarded Jaro Moynahan with distress. "Really, Mr. Moynahan, was it necessary to shoot Stanley? Isn't that—ah—a little extreme? I'm afraid it might incapacitate him, and I had a job for him." "Oh," cried Miss Webb, her brown eyes crackling. "Did you shoot that poor boy? Aren't you the big brave man?" Miss Webb's eyes grew round as marbles. "I wouldn't touch one of those nasty little contraptions for all the Latonka on Mercury." "Here, I'll take them," said Stanley coming back into the room. He had staunched the flow of blood. His face was even whiter, if possible. Jaro eyed him coldly as with his good hand the youth dropped the dart "Act like you want to use those and I'll put a slug in your head next time." "Now, Mr. Moynahan." Mr. Peet licked his lips nervously. "Stanley, go into my office. The doctor will be here in a moment. Miss Webb, you may go home. I'll have no more work for you today." Albert Peet led Stanley through the door. Jaro and Miss Webb were alone. With his eye on the door, Jaro said: "When you go out, turn left toward the native quarter. Wait for me in As the door closed behind the girl, Albert Peet licked his lips, said: "Mr. Moynahan, I suppose my disappearance back at your room requires some explanation. But the fact is that Stanley brought an important bit of news." He paused. Jaro said nothing. "You might be interested to know that Miss Mikail is quite safe. Karfial Hodes has her, but Stanley assures me she will be quite safe." Again he paused. As Jaro remained silent, his neck mottled up pinkly. "The fact is, Mr. Moynahan, that we won't need you after all. I realize "but I've got a date. I'm late now." He started to leave. "Stanley!" called Albert Peet. The pale-faced young man appeared in the doorway, the dart gun in his good hand. Jaro Moynahan dropped on his face, jerking out his slug gun Jaro got up, keeping an eye on Albert Peet, brushed off his knees. "You've killed him," said Peet. "If I were you, Mr. Moynahan, I would Without answering, Jaro backed watchfully from the room. Once Jaro Moynahan had regained the street, he mopped his forehead with A native waiter, attracted no doubt by her scream, came over and took Jaro's order. calling me Joan. You make me feel downright ancient." "Well then," he said. "In the first place, I just killed that baby-faced gunman your boss had in his office." " Awk! " said Joan, choking on the Latonka. "It was self-defense," he hastened to assure her. "He took a pot shot at me with that poisoned dart gun." "But the police!" she cried, as she caught her breath. "There'll never be an investigation. Albert Peet will see to that. I was called here on what I supposed was a legitimate revolution. Instead I was offered ten thousand Earth notes to assassinate the leader of the induce a Mercurian to kill, even in self-protection. That's why Albert first thing the Mercurians will do, will be to boot out the Latonka

<question>:
Why did Moynihan shoot Stanley?

<options>:
A It was an accident.
B Stanley tried to poison him.
C Stanley was protecting Albert Peet.
D He was hired to shoot Stanley.

<answer>:

B