Choose the pair that best completes the analogy.
football field : head coach : :
a. nurse : cardiologist
b. defense : tackle
c. courtroom : lawyer
d. husband : wife

The answer is c. courtroom : lawyer. 

The original analogy, football field : head coach, is comparing a workplace to a profession that would work in that workplace. A, B, and D don't fit that description (A is comparing two similar professions, B is comparing a job with a task that person would do, and D is comparing two people) so C is your best option (it, too, follows the format of workplace : profession.)

Hope this helps!

To describe a new way of thinking that could be relied on