Which Statement Is/are True? I

Multiple Choice

Which statement is/are true? I. If cyclical unemployment is 0%, then the unemployment rate equals the natural rate of unemployment.
II) The unemployment rate consists of only frictional unemployment or structural unemployment.
III) An unemployment rate of zero percent is generally considered the equivalent of full employment.

A) I only
B) II only
C) II and III only
D) I, II, and III