A loss of 90% of the population in the Pingelap atoll from a typhoon in 1775 resulted in a high percentage of the current population being affected by achromatopsia.As a result,all of these affected individuals _____.
A) have normal vision B) are descendants of one of the 20 original survivors C) receive genetic testing and genetic counseling D) have exceptional hearing E) are descendants of the 20 original survivors