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

<passage>:
DOUBLE TROUBLE by CARL JACOBI I was running in circles—especially since Grannie became twins every now and then. Extensive research did not uncover any evidence that the U.S. copyright on this publication was renewed.] We had left the offices of Interstellar Voice three days ago, Earth Xartal, the Martian illustrator, said nothing. He was like that, taciturn, speaking only when spoken to. He could be excused this time, however, for this was only our third day I scowled at that it didn't make sense. per second. The trouble is that by the time the average Martian reaches middle age, his ability to produce those vibrations steadily decreases. Then it was found that this ore, Acoustix, revitalized their sounding apparatus, and the rush was on." "What do you mean?" Park leaned back. "The rush to find more of the ore," he explained. . Chap by the name of Jimmy Baker runs that. crossed the Baldric without trouble." "What sort of trouble?" Grannie Annie had demanded. And when Antlers Park stuttered evasively, the old lady snorted, "Fiddlesticks, I never saw trouble yet that couldn't be explained. We leave in an hour." "This is Jimmy Baker," she said. "He manages I decided I liked Baker the moment I saw him. In his middle thirties, "I can't tell you how glad I am you're here, Grannie," he said. "If anybody can help me, you can." Grannie's eyes glittered. "Trouble with the mine laborers?" she questioned. Jimmy Baker nodded. He told his story over the roar of the wind as we has been bewitched," he began slowly. "We pay our men high wages and give them excellent living conditions with a vacation on Callisto every year. Up until a short time ago most of them were in excellent health and spirits. Then the Red Spot Fever got them." Jimmy Baker nodded. "The first symptoms are a tendency to garrulousness on the part of the patient. Then they disappear." He paused to make an adjustment of the windlass. them. We tried following them, of course, but it was no go. As soon as they realize they're being followed, they stop. But the moment our eyes are turned, they give us the slip." Baker lit a cigarette. "There's all kinds of rumors," he replied, "but they didn't move. After that we were rolling up the driveway that led to the offices of . As Jimmy Baker led the way up the inclined ramp, "Mr. Baker," he said breathlessly, "seventy-five workers at Shaft Four have headed out into the Baldric." Baker dropped his cigarette and ground his heel on it savagely. "There must be ways of stopping this," she said. "Have you called in any physicians? Why don't you call an enforced vacation and send the men away until the plague has died down?" Baker shook his head. "Three doctors from Callisto were here last month. They were as much at loss as I am. As for sending the men away, I may have to do that, but when I do, it means quits. Our company is chartered with Spacolonial, and you know what that means. Failure to produce during a period of thirty days or more, and you lose all rights." A visiphone bell sounded, and Baker walked across to the instrument. A threw off the switch. "The entire crew of Shaft Four have gone out into the Baldric," he said slowly. There was a large map hanging on the wall back of Baker's desk. Baker looked up. "That's right. We only began operations there a level where a huge laboratory and experimental shop ran the length of the building. Grannie seized a light weight carry-case and began roll down the ramp. Not until they had vanished in the desert haze did I sense the loneliness of this outpost. With that loneliness came a sudden sense of neither would her millions of readers. Ezra Karn and I went back into the office. The old prospector chuckled. Larynx Incorporated , and through glass doors I could see clerks busy with counting machines and "It's Mr. Baker's own invention," the operator said. "An improvement on entered the room. It stopped abruptly. "The machine uses a lot of power," the operator said, "and as yet we haven't got much." The cloud of anxiety which had wrapped itself about me disappeared somewhat as I viewed this device. At least I could now keep myself Miss Flowers there?" "Miss Flowers left with Mr. Baker for Shaft Four," I said. "There's trouble up there. Red spot fever." do?" "Tell me," I said, "has your company had any trouble with this plague?" "A little. But up until yesterday the fever's been confined to the trouble, I shouldn't either." We exchanged a few more pleasantries, and then he rang off. In exactly an hour I went upstairs to the visiscreen room. "There's an eyrie over there," Jimmy Baker was saying. "We might as well camp beside it." Moments later a rude circle of flagpole trees loomed ahead. Across the top of them was stretched a translucent web. Jimmy and Grannie got out of the car and began making camp. Xartal remained in his seat. He was "Probably because the drawings are exaggerated in certain details and made a greater impression on their brains," Grannie replied. Then abruptly the screen before me blurred and went blank. "Sorry," the operator said. "I've used too much power already. Have to give the generators a chance to build it up again." attacked by the strange malady. Reading them over, I was struck by one detail. Each patient had received the first symptoms, not while working in the mines, but while sleeping or lounging in the barracks. concentrate and amplify the power of those rays. The internal clockwork served a double purpose. It opened a shutter, and it rotated the lens slowly so that it played for a time on each of the sleeping men. I slid the metal button in my pocket and left the barracks at a run. hundreds of mine workers. Again Park took aim and again a hole shattered our windscreen. speed, I raced alongside. The I. V. manager lifted his weapon frantically. But before he could use it a third time, Ezra Karn had whipped a lariat from his belt and sent it coiling across the intervening space. The thong yanked tight about the manager's throat. Park did the only thing he could do. He shut off power, and the two cars coasted to a "What have you done with Miss Flowers?" I demanded. The manager's eyes glittered with fear as he saw my finger tense on the themselves in a long flanking corridor in a northwesterly direction, as if to hide some secret that lay beyond. Twice I attempted to penetrate I headed for that entrance, and when I reached it, I shut off power with an exclamation of astonishment. "Grannie!" I yelled. "What're you doing here? Where's Mr. Baker?" that cause red spot fever. Those men won't stop walking until they've reached Shaft Four." Grannie Annie told her story during the long ride back to Shaft Four. We drove slowly, keeping the line of marching Larynx miners always ahead of us. Jimmy Baker had struck a new big lode of Acoustix, a lode which if worked successfully would see . Antlers Park didn't want that. this Eighth Moon, so also was that spot a deadly power in itself, capable when its rays were concentrated of causing a fatal sickness. Then suddenly becoming fearful of Grannie's prying, Antlers Park strove to head her off before she reached Shaft Four. He did head her off and managed to lure her and Baker and Xartal into the Shaft barracks where they would be exposed to the rays from the lens button. But Grannie only pretended to contract the plague.

<question>:
Why was Baker hesitant to send his employees on an enforced vacation?

<options>:
A He feared they would have too much difficulty getting the employees back to work.
B He feared that would not stop the plague of Red Spot Fever.
C He feared they would lose chartered rights with Spacolonial
D He feared their work would suffer from the break.

<answer>:

C