Fill in the blank (_) in the following sentence from the following choices.
Sentence: The age of Elena's mother was older than Rachel's mother because _ mother was born after.

Choice 1: The age of Elena's mother was older than Rachel's mother because Elena mother was born after.
Choice 2: The age of Elena's mother was older than Rachel's mother because Rachel mother was born after.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
2
2. The sentence should read "The age of Elena's mother was older than Rachel's mother because Rachel's mother was born