Answer:
I'm assuming that it could be the third one or 'C' It seems like it's the most best answer and more realistic to say at the very least...
The US started making hydrogen bombs when the USSR succeeded in creating an atomic bomb. The United States used to have the largest bomb, but when the USSR surpassed them, the US decided to create a better bomb (theorized to be hundreds of times larger than any nuclear bomb ever made).
B because since this means that humans no longer have to travel, since they can do things like farm on a regular basis.
Extra-
Choice A would be incorrect because it's the opposite of what the ability to acquire food on a regular basis. They can control and alter the environment to do things like plant. Choices C and D have nothing to do with the ability to acquire food on Ba regular basis.
At the beginning he is described as full of rage and brilliant<span />