In a Landmark Study by Caspi Et

In a landmark study by Caspi et. al. (2003) , researchers studied the stressful life events and genetics of 847 individuals. For individuals who had at least four stressful life events, the risk of major depression

A) remained unchanged regardless of genetic makeup.
B) doubled if they possessed two short alleles of the gene being studied.
C) was reduced by half if they possessed two short alleles of the gene being studied.
D) was entirely related to the genetic makeup and not the number of life stressors.