Fill in the blank (_) in the following sentence from the following choices.
Sentence: The gym trainer was teaching everybody how to get bigger arms before legs, since the _ are weaker.

Choice 1: The gym trainer was teaching everybody how to get bigger arms before legs, since the arms are weaker.
Choice 2: The gym trainer was teaching everybody how to get bigger arms before legs, since the legs are weaker.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
1
2. The gym trainer was teaching everybody how to get bigger arms before legs, since the legs are weaker. (This is incorrect, but