What does the matching concept refer to?

To motivate his employees, Enzo gave them tasks with added responsibility and room for recognition. Enzo was using job ______.

Fill in the blank(s) with the appropriate word(s).

Using a(n) ________ close, a salesperson would ask a prospect how much she would like to order

A) trial B) standing-room-only C) alternative D) assumptive E) follow-up