Answer:
A. rapid shirt completion with a short break after each five completed
Explanation:
She most likely engaged in rapid shift completion with a short break after each five completed to be able to receive the $5. The reward becomes her motivation for doing the work rapidly and quickly as possible. Since emphasis is laid on completion of the 5 shirts for the payments, she'd not be concerned with any other thing again than how quickly she can complete sewing five shirts. Also, she'd only take a short rest after completing 5 shirts because she's influenced by the fact that ome shirt isn't equivalent to $1. So to meet up with that amounts, she completes the 5 rapidly as a unit, then takes a short break and repeat the process again.