Fill in the blank (_) in the following sentence from the following choices.
Sentence: Nelson was required to keep a food journal that Derrick was not because _ had already completed a diet.

Choice 1: Nelson was required to keep a food journal that Derrick was not because Nelson had already completed a diet.
Choice 2: Nelson was required to keep a food journal that Derrick was not because Derrick had already completed a diet.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
2
1.