NEED HELP ASAP :,) Which of the following has been the effect of physical features on the historical development of Japanese culture?

a. Japan’s island location caused it to be frequently attacked by naval powers like Holland and Great Britain.

b. Its vast plains made it an important exporter of food to other Asian nations.

c. Its location in Asia made it subject to conquest by advancing Islamic armies from the Arabian Peninsula.

d. Its high population density encouraged social closeness while its island location protected bit from conquest.