Which statement is true about Japan?
A. Japan is an island
B. Japan is a peninsula
C. Japans is landlocked

I think it's A. Japan is an island

Explanation:

because Japan is an island country

The civilizations of Olmec, Aztec, Incas and Indian Tribes are not that early compared to most. But any civilization needs to have a protected food supply. So a geography that comprises an area for good farming would be a requirement. Also, make it certain that the river you selected to live by is not going to dry up or freeze over every year.