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 none of the four is pure recessive?

A) .316
B) .75
C) . 0625
D) .004