Which of the Following Is Part of the "Protectionist" Perspective

Which of the following is part of the "protectionist" perspective on international trade?

A) Imports are responsible for crowding out domestic goods from the market and thereby reduce American jobs
B) Trade restrictions are needed to protect key industries vital to national security
C) Imports should be restricted to remedy the balance of trade deficit
D) Both (a) and (c)
E) All of the above