What officially started the American Revolution A) the battle at Concord between the French navy and American soldiers. B) the Battle at Lexington between British soldiers and American militiamen?

It is B, once they started firing at each other there was no going back.

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.