Suppose the civilian non-institutional population equals 10,000 persons; the civilian labor force equals 7,500 persons; there are 7,000 employed persons and 500 unemployed persons. If 1,000 persons who are currently "not in the labor force" decide to join the civilian labor force, and 300 of them are unemployed, then

both the unemployment and the employment rate rise.
both the unemployment and the employment rate fall.
the unemployment rate rises and the employment rate falls.
the unemployment rate falls and the employment rate rises.