The Principal Disadvantage of Descriptive\correlational Research Methods Is

Multiple Choice

The principal disadvantage of descriptive\correlational research methods is

A) because of practical or ethical reasons, they cannot be used to study some research questions.
B) since researchers cannot control variables of interest, conclusions concerning cause-and-effect relationships are not appropriate. ​
C) they do not allow the researcher to describe behavior. ​
D) they frequently observe behavior in artificial situations. ​