What did the british navy do that affected the colonies during the war? a. they hired privateers to make their forces larger. b. they razed all the major north american port towns. c. they defeated any pirates attacking the colonies. d. they formed a blockade of american ports.

The correct answer is D. They formed a blockade of American ports.

Great Britain issued a seize and detain order against rebel American shipping and then passed the Prohibitory Act (which banned all commerce with the rebel colonies and authorized the seizure of the American ships).

To enforce this undeclared commercial blockade, warships were sent to North America.

The correct answer is A. Since the British were able to rise a significant amount of funds to fight the war, and even though their military was the best in the world, they could hire mercenaries or privateers, such as nearly 30,000 Hessians, German soldiers of excellent ability.    

congress also has implied powers, which derive from the necessary and proper clause of the constitution and permit congress "to make all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this constitution in the government of the united states.