How Was the Japanese Red Army Formed

How was the Japanese Red Army formed?

A) A student group supporting communism radicalized and turned to terrorism after studying the third wave of terrorism.
B) Anarchists in Japan observed McVeigh's efforts in the United States and decided to try terrorism in Japan.
C) The military saw that they could change a lot of things in Japan and so they formed "an army within an army."
D) A Marxist leaning college graduate moved to Lebanon and began cooperating with Palestinian terrorist groups.