9) She was watching the play, me too/and.

Необходимо выбрать too или and.

She was watching the play, me too. - Она смотрела пьесу, я тоже.

She was watching the play, me and - Она смотрела пьесу, я и.

Больше подходит too.

Ответ: She was watching the play, me too.