If someone can help me that would be great <3

Which of the following was a similarity between classical mesoamerican and south american civilizations ?

Which act of the conquistador pizarro was crucial in overthrowing the inca? a. the destruction of the ancient inca city, machu picchu b. the siege of the inca capital near the cuzco valley c. the execution of the last inca ruler, atahualpa d. the unexpected deaths of 3 million inca warriors e. the murder of former inca emperor, huascar

The purpose of the comintern was a. to spy on anti-communist activity. b. to spread communism in other countries. c. to administer communist rule. d. to develop future communist leaders.