Answer:
China had become communist in 1949 and communists were in control of North Vietnam. The USA was afraid that communism would spread to South Vietnam and then the rest of Asia. It decided to send money, supplies and military advisers to help the South Vietnamese Government.
Explanation:
It is in mainly in athens sparta is all about millitary
I don’t know if this is right but as someone who is native I’m going to guess during conversion of religion. Again I don’t know if that’s the main one they want but it was a contributing factor. :)
I think india might be slightly bigger, but singapore has greater population
Research : https://www.google.com/url?sa=t&source=web&cd=1&ved=0ahUKEwiJytygnuDMAhWJGR4KHXbyA-kQFggKMAA&url=http%3A%2F%2Fcountry-facts.findthedata.com%2Fcompare%2F106-122%2FSingapore-vs-India&usg=AFQjCNFMKvkuF1M-U9NucuNiibJ0VhyX7A&sig2=x7zwRv3mIfdUiUZ6duFlqg
Maybe option (B?
I hope I helped but if I didn’t I’m sorry