Which Question Should You Ask If You Wish to Critically

Which question should you ask if you wish to critically evaluate evolutionary hypotheses regarding gender differences in spatial abilities

A)  Are there alternative explanations for the results, such as differences in experience between males and females? 
B)  Are there other differences between males and females that are more important, such as differences in intelligence? 
C)  Are there other data that confirm this difference, such as performance among professional athletes? 
D)  Are there ethical reasons that we should not conduct this research, such as the risk of stereotyping females?