Fill in the blank (_) in the following sentence from the following choices.
Sentence: The air purifier will not fit through the doorway because the _ is too slim.

Choice 1: The air purifier will not fit through the doorway because the air purifier is too slim.
Choice 2: The air purifier will not fit through the doorway because the doorway is too slim.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
2
2.