Friedman is strongly opposed because

the goals of CSR are unclear.

Friedman is strongly opposed because

CSR leads down a road to communism. [Context: The 1970s marked the height of the Cold War, where Communism represented the enemy's (Soviet Union) ideology.]

Friedman is a strong advocate of the

idea as it makes the world a more just place.

Friedman is strongly opposed because

managers engaging in CSR are spending someone else’s money.