European exploration in the fifteenth century was assisted by the influence of :

European exploration in the fifteenth century was assisted by the influence of Portugal. European exploration in the fifteenth century was assisted by the influence of Portugal. This answer has been confirmed as correct and helpful.

necessary and proper clause. the congress shall have power to 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, or in any department or officer thereof.

john maynrd keynes developed new economic respose to the                           ( b. great depression if the 1930's)