Fill in the blank (_) in the following sentence from the following choices.
Sentence: At camp, they blew a bugle for breakfast and a whistle for lunch, and since they blew the _ we knew it was lunch.

Choice 1: At camp, they blew a bugle for breakfast and a whistle for lunch, and since they blew the whistle we knew it was lunch.
Choice 2: At camp, they blew a bugle for breakfast and a whistle for lunch, and since they blew the bugle we knew it was lunch.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
1
2. The sentence should be "At camp, they blew a bugle for breakfast and a whistle for lunch, and since they blew the