In Analyzing the Interaction Between Age and Gender,Reba Finds a Difference

In analyzing the interaction between age and gender,Reba finds a difference in hiring likelihood between young and old applicants when they are females.However,she finds no difference between young and old applicants when they are males.Based on the findings,Reba has examined the

A) main effect of age.
B) main effect of gender.
C) simple main effect of age.
D) simple main effect of gender.