Which of the Following Statements About the Hb^S Allele Is

Which of the following statements about the Hb^S allele is FALSE?

A) It is found in higher gene frequencies in regions where malaria is endemic.
B) In areas where malaria has been reduced through drainage and insecticides, its frequency declines.
C) It causes sickle-cell anemia in homozygous individuals.
D) Heterozygous individuals have an increased immunity to malaria.
E) Homozygous individuals usually develop fatal cases of dysentery.