What was one method consumer activists used to applied pressure to the government of South Africa to help end apartheid?

Question $2$ options:

A$)$ Pension plans invested with businesses that operated in South Africa.

B$)$ The government of the United States froze the bank accounts of the South African government.

C$)$ Pension plans divested funds from any business operating in South Africa.

D$)$ It was not necessary to apply pressure because the practice of apartheid was so morally repugnant that activism was not necessary.