Fill in the blank (_) in the following sentence from the following choices.
Sentence: You should feed that lettuce, not that carrot to your rabbits because the _ is easier for them to digest.

Choice 1: You should feed that lettuce, not that carrot to your rabbits because the lettuce is easier for them to digest.
Choice 2: You should feed that lettuce, not that carrot to your rabbits because the carrot is easier for them to digest.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
1
1.