What does the passage mainly talk about？A．Scribbler50"s attitude towards smoking bans.B．Th

What does the passage mainly talk about？

A．Scribbler50"s attitude towards smoking bans.

B．The research on how people can stop smoking.

C．The effectiveness of smoking bans.

D．Smoking bans in restaurants and bars.

请帮忙给出正确答案和分析，谢谢！