Jeanette Is Studying the Association Between Middle-Aged Adults' Education Level

Multiple Choice

Jeanette is studying the association between middle-aged adults' education level and the education level of their parents.She has access to some genetic information about both generations,and decides to control for how shared genetics might explain the relationship between the education levels of middle-aged adults and their parents.In a separate study,Bowden is analyzing whether economic resources predict elementary school students' grades indirectly through the nutritional quality of students' diets.In these two studies,shared genetics

A) and nutrition are both possible confounding variables.
B) and nutrition are both possible mediators.
C) is a possible confounding variable and nutrition is a possible mediator.
D) is a possible mediator and nutrition is a possible confounding variable.