Answer:
The answer is D: economic sanctions
Step-by-step explanation:
The United States and other governments did not want to support the South African apartheid, so they decided to organize a boycott of South American goods. The United States and other governments also imposed economic sanctions, or refused to trade with South America. These strategies caused the South American economy to weaken. Therefore, the answer is D: economic sanctions.
I am 100% sure this is correct ;D