Four Sections of General Biology Were Taught by Four Lecturers $\mu$

Four sections of General Biology were taught by four lecturers who used different tests over the same material. The four students, one from each section, compared test scores on the material in Part 1 to see who did the best. Use z scores to choose the winner:

A) Jimmy 15, class parameters, $\mu$ = 12, $\sigma$ = 2
B) Jeff 54, class parameters, $\mu$ = 50, $\sigma$ = 5
C) Jon 47, class parameters, $\mu$ = 37, $\sigma$ = 5
D) Aaron 93, class parameters, $\mu$ = 85, $\sigma$ = 10.