Fill in the blank (_) in the following sentence from the following choices.
Sentence: Katia prefers posting her personal messages on Twitter to Facebook because the _ is much more public.

Choice 1: Katia prefers posting her personal messages on Twitter to Facebook because the Facebook is much more public.
Choice 2: Katia prefers posting her personal messages on Twitter to Facebook because the Twitter is much more public.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
1
2.