The colonists had difficulty coming together to revolt because they:

A. were not complety unified.

B. had not read the prowar pamphlets.

C. had no real reason to fight.

D. were waiting for approval from parliment.

A. Many colonists disagreed on whether to force Great Britain to give in to their demands or break away completely. Some didn't even want to break away from Britain. Overall, the colonists union were very weak.

The correct answer is A. were not completely unified.

B is not correct because they don't need to read a pamphlet to decide that something is wrong and should be changed. C is incorrect because they definitely did have reason to fight - they wanted their independence. D is incorrect because it would be stupid to wait for someone to give you an approval before you can start rebelling.

This leaves us with A as the correct answer - some colonists didn't want to separate from Britain, and some did.