In the 30s, the Japanese Empire was, in fact, in need of resources. Although throughout world war 2 we see that they have eyes on territory the most, their primary goal was actually to gain resources, as their islands have no natural resources, which narrows their options during development. China was on of their neighbors that they attacked, firstly at Manchuria, because it was a large area of the country that generated resources that were vital to the Japanese. They also attacked Korea and later the United States, as the U.S had placed a trade embargo on Japan.
Lets eliminate
A. organ transplant:
this was debated maybe 200 years ago (give or tak) and is no longer an issue
B. genetic engineerign
this is kind of debated becuase some scientists are trying to make life and that has to do with ethics because they would be playing god
C. space exploration
not debatable
D. prosthetics
we already have this and tis i not debatable
answer is B
1 is the answer to your question.
life,life has its own irony
The answer is B. All the railers cared about was moving more material for cheaper. I hope this helps!