Aprimary reason for truman’s decision to drop the atomic bombs on japan was that he

1. thought that it would lead to fewer deaths than a land invasion

2. thought that japan was developing nuclear weapons

3. feared a soviet and japanese alliance

4. wanted to retaliate for the pearl harbor attack

The correct answer is - A. Thought that it would lead to fewer deaths than a land invasion.

Truman decided to order the dropping of the atomic bombs on Japan because he thought that the US army would suffer a lot of casualties if they tried a land invasion. Considering how hard and slow the island to island war with Japan, and how much soldiers were dying, Truman decided to end the war as quick as possible, and as efficient as possible. He ordered the dropping of the atomic bombs, and it managed to have the effect he wanted. Japan surrendered immediately after that, the war was over, and lot of US soldiers' lives were saved. On the other hand, it was a huge humanitarian catastrophe, as hundreds of thousands of innocent people died or suffered badly because of the atomic bombs. The negative effects continued in the decades that came, and are still present today.

when studying cause and effect, historians usually group the causes into different categories. for example, cultural causes reflect how a society’s literature and art convey the way the society saw itself in relation to the rest of the world. another resource that historians use to understand society is pop culture, which tells them the trends and ideas that are preferred by the common people. when studying cause and effect, it’s important to remember multiple causation, or the idea that an effect could have several causes and vice versa.  

the correct option is “cultural causes” since art and literature are related to the culture of a place. culture is determined by literature, art, music.

the correct option is “pop culture” since it reflects the likes and ideas of common people whereas the rest of the options do not focus on common people.  

the correct option is “multiple causation” since it refers to the idea that events are caused by multiple reasons, not just a single one.