Which of the following shows the correct cause-and-effect relationship which led to world war ii

The correct cause-and-effect relationship which led to World War II is the aggressiveness of Japan, Italy, Germany and Treaty of Versailles’ that caused resentment for the German. Its effect is that this led to the use of nuclear weapons during the war and later led to the Cold War.

the real answer is b

i think i will need more detail to answer if this is a specific question on a test, but technology advancements are good for many industries, such as medicine or food industries, new technology could us in medicine in ways such as new scanners to tell us more about our bodies or new cures or vaccines for diseases.