Answer:
a. Angola
Explanation:
Shortly after being independent, Angola came to receive aid from the Soviet Union to become a socialist country, and the USSR saw this as a step forward to spread communism among countries in Africa.
The military assistance led to a civil war. It happened just right after Angola had become free from Portugal in 1975, the war was fought between the People's Movement for the Liberation of Angola (MPLA) and the National Union for the Total Independence of Angola (UNITA).
This was a major scenario of the Cold War dynamics where the U.S. and the USSR engaged in yet just another "proxy war"
