Which answer best shows an effect of british soldiers firing upon colonists in boston, killing five of them?

a the first shots of the american revolution are fired, which officially starts a war between the colonies and britain.
b the sons of liberty protest by dumping tea into boston harbor, which becomes known as the boston tea party.
c samuel adams uses propaganda about the event to gain colonial support for the patriots in their fight against the british.
d delegates meet at the first continental congress to demand that britain repeal the coercive (intolerable) acts.