Read the following premise and pick the correct choice. Then, respond with which of the choices is correct.
Premise: My mailbox was overflowing with letters.

Choice 1: The lid on the mailbox broke.
Choice 2: I went on vacation for two weeks.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
2
1 (assuming the premise is true and the mailbox was actually overflowing)