Read the following dialogue and choose the right answer.

Source: freepik.com

Mrs. Lala: Dear students. There are some rules you must obey in this classroom. First, you must pay attention to the teacher. Second, you must not talk too much. Also, you must bring your own book. Any question?

Rudi: Can I use my cellphone in this classroom?

Mrs. Lala: You can use it only during break time. But remember, you must not play mobile game in the classroom during class. It will disturb your concentration, okay?

Students: Yes, Ma’am.

Based on the dialogue, how many expression of forbidding that Mrs. Lala says?