Which of the Following Is NOT a Research and Statistical

Which of the following is NOT a research and statistical concept to keep in mind when conducting psychological research?

A) How variables are defined and measured.
B) The titles of studies rarely indicate when participants are exclusively White or male,and generalizability is often falsely applied.
C) Female university students are rarely a source of convenience samples for many researchers.
D) Sampling bias is a challenge within the field of psychology of women.