Then he wrapped my hands , put the gloves on me and brought me over to the heavy bag . He 'd call out strings of punches like , " 2 , 3 , 2 , 4 ! " and I 'd have to hit the bag with the corresponding punches that I just learned . That part was fun .

Based on the preceding passage, choose your answer for question What does " he " do for work ?
Select from:
(a). None of the above choices .;
(b). He makes heavy bags .;
(c). He calls out strings of punches .;
(d). He is a personal trainer .;
The answer is:
(d).