Answer:
Correct answers are:
a. to raise revenue for British troops stationed in the colonies
b. to raise revenue to pay the British debt from the French and Indian War
c. to gain control over the colonists
Step-by-step explanation:
A, B and C are correct because after the war with France the national debt of Britain was higher than ever. In addition to that they decided to locate large number of troops in the colonies with the goal to protect what was achieved in the war. Of course, all of this meant that they need new taxes. That is why Stamp Act was enacted, because they needed to control the colonists who were paying the taxes more than ever.
D is not correct answer because British crown was trying to make colonists obey them more, not to unify them.