US Unemployment as a Result of Free-Trade Agreements Such as NAFTA

U.S. unemployment as a result of free-trade agreements such as NAFTA:

A) should be taken much more seriously, and workers should be offered assistance.
B) is a temporary phenomenon to which the economy will adjust within a few years.
C) results in a shift into lower productivity jobs such as hamburger flipping.
D) results in a shift into lower productivity jobs such as hamburger flipping and is a temporary phenomenon to which the economy will adjust within a few years.