Fill in the blank (_) in the following sentence from the following choices.
Sentence: You know that the drums will take longer than the flute to learn, so the _ was more complex to study.

Choice 1: You know that the drums will take longer than the flute to learn, so the flute was more complex to study.
Choice 2: You know that the drums will take longer than the flute to learn, so the drums was more complex to study.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
2
2.