The colonists protested the stamp act by

a. refusing to buy or use printed materials.
b. attacking british ships carrying trade goods.
c. boycotting goods made in britain.
d. leaving the colonies and returning to europe in protest.

B because the Americans hotly protested this "taxation without representation" and insisted that only their elected colonial legislatures had the right to tax them. Prolonged violence and threats against royal officials in the colonies resulted in Parliament repealing the Stamp Act the next year, in 1766.

The Answer is refusing to buy or use printed materials.  You should look up about the Stamp Act online. It will give you some more clarity.