At Full Employment There Still Exists Some Unemployment Because

Multiple Choice

At full employment there still exists some unemployment because

A) some portion of our population will always be too lazy to work.
B) there are always people too old or young to be in the labor force.
C) the U.S.economy is constantly creating and destroying jobs.
D) it is unnatural to have all people work 40 hours per week.
E) real GDP can never exceed potential GDP.