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One way to classify humans is by their blood type. There are over two dozen ways to group blood types. One of them is by the presence of the D antigen on the surface of blood cells. If an individual expresses the D antigen, they are referred to as Rh positive. This is controlled by an autosomal dominant allele. In a given town, 16% of the population is considered Rh negative.

If this town's high school has 2,000 students, how many would you expect to be heterozygous for the D antigen?

A

160

B

320

C

720

D

960

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