Which of the Following Is the Major Qualification of the Research

Which of the following is the major qualification of the research findings on gender differences?

A) Most of the research has been conducted on white middle-class children.
B) The data are indicative of group differences and tell us little about individuals.
C) The findings are based on only a few studies and are therefore not very representative of the population.
D) There is wide variation from study to study in how the variables have been operationalized.