Which of these actions is an example of practice delayed gratification rather than acting on a impulse

There are no options given but there was a previous question that was similar to yours. The options were:

A. spending extra time practicing your tennis swing to prepare for a match  

B. Drinking a beer at a party to impress some older friends  

C. Ordering a salad instead of a burger at lunch  

D. Staying up late to watch a new TV show instead of getting enough sleep

Out of those options the correct answer was:

C) Ordering a salad instead of a burger

Ordering a salad instead of a burger is delayed gratification because even though you might have enjoyed a burger more, your body will thank you later for choosing the salad.