The original purpose of the constitutional convention of 1787 was to
a. revise the articles of confederation.
b. elect the first president of the united states.
c. develop the principle of states' rights.
d. solve the slavery issue.

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.