Why Did the CIA Seek to Destabilize the Government of Chile

Why did the CIA seek to destabilize the government of Chile after 1970?

A) The country had elected socialist Salvador Allende into office.
B) The U.S. sought to prevent the coup of General Augusto Pinochet.
C) The Chilean government had blocked U.S. access to Chilean copper mines.
D) The government of Chile had provided North Vietnam with covert support.
E) Chile had been hosting Che Guevara, a long-time public enemy to the United States.