What must be true for an economy to have full employment? Select all that apply.

A.
The cyclical unemployment rate must be zero.

B.
The voluntary unemployment rate must be zero.

C.
The deficient-demand unemployment rate must be zero.

D.
The structural unemployment rate must be zero.

E.
The frictional unemployment rate must be zero.

A. The cyclical unemployment rate must be zero.

D. The structural unemployment rate must be zero.
E. The frictional unemployment rate must be zero.