Which of the Following Correctly Represents the Probability That a Detrimental

Which of the following correctly represents the probability that a detrimental autosomal recessive allele will actually be expressed in a population if the occurrence of the allele is such that 1 in 50 individuals are heterozygous?

A) 1/50 * 1/50 = 1/2500, with 1/4 of their children homozygous recessive = 1/2500 * 1/4 = 1/10,000.
B) 1/50 * 1/4 that are homozygous recessive = 1/200.
C) 1/50 * 2 children (on average) * 1/4 that are homozygous recessive = 1/100.
D) 1/50 * 2 parents * 4 children * 1/4 that are homozygous recessive = 1/25.
E) Cannot be determined from the information given.