Answer:
Attucks became a symbol of the colonial cause of liberty after dying in the Boston Massacre.
Step-by-step explanation:
Only last option is correct as Attucks was neither member of the Committee, neither the first free African American in southern colonies.
On the other side the soldiers who killed him, among the others were defended by John Adams.
Attucks was among people who were killed by British soldiers, and that event is known in history as Boston Massacre. It was one of the events that led to Revolution.