How should you act during a role-play with your classmates about refusing tobacco?
nervous
confident
unsure
like a bully

Confident is the best action A person should use during a role play with his classmate about refusing tobacco. Hence the answer is option B.

Explanation:

Tobacco is getting more famous among the teens. And it is the root cause of all the the disturbance and diseases. Smoking and use of tobacco negative effects the mental and physical condition of the person. It is also the root cause of all the accidents that takes place in the road while driving.

Role play is a best method to elaborate the negative effect. And the person who wants to refuse must act confidently. You should not be nervous or unsure or I should not behave like a bully.  

obviously, the latter.

this is really easy just look up what these words mean