In order to alleviate the obesity epidemic, there is a call for research to become increasingly more interdisciplinary.

In order to alleviate the obesity epidemic, there is a call for research to become increasingly more interdisciplinary. Recent work has looked at the influence of hormones like leptin and ghrelin as well as how an individual’s thoughts about health can change eating behaviors and even how hormones change in relation to these thoughts.
These researchers are crossing the ______ and _____ levels of analysis.
a.individual; social
b.biological; social
c.biological; individual
d.social; cultural