Psychologist Colin DeYoung and His Colleagues Studied Over 100 Male

Psychologist Colin DeYoung and his colleagues studied over 100 male and female participants who underwent MRI scans and took the NEO Personality Inventory, a personality test that is used to measure the Big Five. The researchers then compared the brain scans of participants and the personality test results. The researchers found that agreeableness was associated with _____ in the _____, a brain region associated with understanding the beliefs of others.

A) increased volume; posterior cingulate cortex
B) decreased volume; posterior cingulate cortex
C) increased volume; medial orbitofrontal cortex.
D) decreased volume; medial orbitofrontal cortex