The Selective Advantage Linked to the High Frequency of the Cystic

The selective advantage linked to the high frequency of the cystic fibrosis allele in Caucasians is:

A) an increased resistance to falciparum malaria
B) the prevention of excessive water loss associated with certain types of diarrhea
C) production of an enzyme to break down cholera toxin
D) increased mucous secretions for the removal of infectious cells
E) an increased probability of Salmonella infection

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