What was the question for this implicit rationale, and corresponding answer?
She had to listen to and serve customers at table.
 The answer: serve customers

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
The question: When she would wait tables she had to listen to and what?
Options:
- serve customers
- serve food
- tipping
- write
- wash hands