Fill in the blank (_) in the following sentence from the following choices.
Sentence: Elena asked for health advice from Jessica, since _ had gotten the mumps twice before.

Choice 1: Elena asked for health advice from Jessica, since Elena had gotten the mumps twice before.
Choice 2: Elena asked for health advice from Jessica, since Jessica had gotten the mumps twice before.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
2
1.