A Major Reason Why It Is Difficult to Lower the Barriers

A major reason why it is difficult to lower the barriers to free trade is

A) the inability to compensate losers from free trade.
B) that the barriers allow us to compete with cheap foreign labor.
C) the loss of jobs without any gain of jobs from free trade.
D) the uneven distribution of gains and losses from free trade.
E) that total benefits are less than total costs from free trade.