Correct: The answer is b. Nixon justified his invasion of Cambodia by stating that increased enemy activity in Cambodia would endanger the lives of American soldiers in Vietnam. Allowing this to occur unchecked would be an unacceptable risk.
Incorrect: The answer is b. Nixon justified his invasion of Cambodia by stating that increased enemy activity in Cambodia would endanger the lives of American soldiers in Vietnam. Allowing this to occur unchecked would be an unacceptable risk.