Fill in the blank (_) in the following sentence from the following choices.
Sentence: Elena wanted to help Mary improve her mental health and verbal memory because _ was very caring.

Choice 1: Elena wanted to help Mary improve her mental health and verbal memory because Elena was very caring.
Choice 2: Elena wanted to help Mary improve her mental health and verbal memory because Mary was very caring.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
1
1.