Single/multi-select question: Does the sentence "Some of the subjects were investigated for alleged ties to the Communist party (Charlie Chaplin and Groucho Marx), or in connection with antiwar activities during the Vietnam War (John Denver, John Lennon, and Jane Fonda)." provide a valid answer to the question "What activities was the FBI concerned with during the Vietnam war?"
OPTIONS: (a). yes; (b). no;
(a).