Which of the following is correct about this passage？A．Some offensive breath can"t easily

Which of the following is correct about this passage？

A．Some offensive breath can"t easily be cured.

B．Heavy drinkers are less affected by bad breath.

C．Elderly people are less affected by bad breath.

D．Offensive breath is less affected by alcohol.

请帮忙给出正确答案和分析，谢谢！