Parliament repealed the Stamp Act because: A)colonial protests were not effective
B)Parliament realized it had no right to tax the colonies
C)colonial protests were harming british trade

colonial protests were harming british trade

Explanation:

  the common sense as a pamphlet written by thomas paine. it promoted the independence of the colonies from british rule. the distribution of this pamphlet was great, it reached people everywhere and it was even read aloud at places people met. it also unite the colonists before the revolutionary war.

answer is d