"Attitudes Toward Global Warming Vary as a Function of Political

Multiple Choice

"Attitudes toward global warming vary as a function of political party." What is the main problem with how this research hypothesis has been stated?

A) It addresses a sensitive political issue.
B) It does not indicate the direction of the relationship between variables.
C) It does not identify the dependent variable included in the study.
D) It does not fully identify the independent variable included in the study.