Fill in the blank (_) in the following sentence from the following choices.
Sentence: Betty does better on Jeopardy than Jessica was able to do, so _ 's intelligence level is lower.

Choice 1: Betty does better on Jeopardy than Jessica was able to do, so Betty 's intelligence level is lower.
Choice 2: Betty does better on Jeopardy than Jessica was able to do, so Jessica 's intelligence level is lower.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
2
2.