Pls help, need to pass!

Which of these were effects of mass production techniques used during 1920s

Question 4 which of the following is an example of libel? a. an anti-war supporter advocates overthrow of the government. b. a writer for the washington post maliciously prints false information about a lawyer c. a politician screams obscenities at a reporter on the air. d. a person sets up a flag burning demonstration.

What was the goal of the united states' invasion at the bay of pigs?