Read the following premise and pick the correct choice. Then, respond with which of the choices is correct.
Premise: I drank a cup of coffee.

Choice 1: My yawning ceased.
Choice 2: I nodded off to sleep.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
1
1. The caffeine in coffee is a stimulant that can help reduce feelings of drowsiness and yawning.