The Frequency of Sickle Cell Anemia,caused by a Homozygous Condition

Multiple Choice

The frequency of sickle cell anemia,caused by a homozygous condition (Hb^sHb^s) is approximately 0.0016.The normal condition is also a homozygous condition (Hb^AHb^A) .Assuming the Hardy-Weinberg equilibrium applies,what is the frequency of the carrier state (Hb^AHb^s) ?

A) 0.0228
B) 0.0432
C) 0.0768
D) 0.0987
E) 0.0384