Fill in the blank (_) in the following sentence from the following choices.
Sentence: Elena managed to kill Monica first in the terrible war, because _ was slower in reacting to the situation.

Choice 1: Elena managed to kill Monica first in the terrible war, because Elena was slower in reacting to the situation.
Choice 2: Elena managed to kill Monica first in the terrible war, because Monica was slower in reacting to the situation.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
2
2.