·Look at the questions for this part. ·Yo

问题：

·Look at the questions for this part.
·You will hear a passage about "American Weighs In ". You will listen to it twice.
·For questions 24-30, indicate which of the alternatives A, B, or C is the most appropriate response.
·Mark one letter A, B, or C on the Answer Sheet.

What is believed to be able to prevent and mitigate numerous chronic ailments

A．High blood pressure

B．A reasonable body weight

C．Smoking