Solve the Problem, Rounding the Answer as Appropriate

Multiple Choice

Solve the problem, rounding the answer as appropriate. Assume that "pure dominant" describes one who has twodominant genes for a given trait; "pure recessive" describes one who has two recessive genes for a given trait; and"hybrid" describes one who has one of each.
-Two hybrids produce a litter of four offspring. What is the probability that exactly one is pure recessive?

A) .25
B) .422
C) .211
D) .133