Fill in the blank (_) in the following sentence from the following choices.
Sentence: I was very scared to put the new machine on the desk, because the _ was heavy.

Choice 1: I was very scared to put the new machine on the desk, because the machine was heavy.
Choice 2: I was very scared to put the new machine on the desk, because the desk was heavy.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
1
1.