Fill in the blank (_) in the following sentence from the following choices.
Sentence: It took Aaron a long time to finish his work compared to Leslie because _ is very hardworking.

Choice 1: It took Aaron a long time to finish his work compared to Leslie because Aaron is very hardworking.
Choice 2: It took Aaron a long time to finish his work compared to Leslie because Leslie is very hardworking.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
2
2.