Choose the Correct Definition for Each of the Following Underlined

Choose the correct definition for each of the following underlined words from the essay.
-So there's the challenge, how precisely do you learn about the neuroanatomical connections of the prefrontal cortex cortex or the joys of confirmatory factor analysis without having to put up with a bit of boredom?

A) right hemisphere of the brain
B) blood vessels in the brain
C) proteins in the brain
D) front of the brain