After the Sharp Increase in Protectionist Trade Policies During the Great

After the sharp increase in protectionist trade policies during the Great Depression of the 1930s and the devastation of World War II, in 1950:

A) world exports were just 0.5 percent of world GDP.
B) international trade as a percentage of world output was about as large as it was in 1929.
C) world exports were about 5.5 percent of world GDP.
D) world exports were nearly 20 percent of world GDP.