Fill in the blank (_) in the following sentence from the following choices.
Sentence: Elena helped to maintain Kayla's office space every day for productivity because _ was a janitor.

Choice 1: Elena helped to maintain Kayla's office space every day for productivity because Elena was a janitor.
Choice 2: Elena helped to maintain Kayla's office space every day for productivity because Kayla was a janitor.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
1
1.