How was the stamp act different from earlier taxes imposed on the british colonies?

a) the stamp act was only enforced in the southern colonies; northern colonies were not affected by the taxes.
b) revenue collected under the stamp act was given to the colonial governments instead of the british government.
c) the stamp act directly affected the colonists; taxes prior to the stamp act were indirect taxes, paid only by merchants.
d) representatives from the colonies were elected to parliament so that colonial interests could be addressed in the debate over passage of the stamp act.