During the Great Depression, the U.S. was not firmly tied to the world economy

In the figure above

A) moving from point a to point b would require new technology. B) production at point b is efficient whereas production at point a is not efficient. C) some resources must be unemployed at point c. D) opportunity costs are decreasing.

Computers and software programs are

a. inferior goods b. complementary goods c. goods with a cross-price elasticity of demand of 0 d. substitute goods e. perfectly elastic goods