·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.

Compared to the late 1970s, the percent of children aged 12 to 17 who were overweight in 1994 ______.

A．decreased

B．remained unchanged

C．increased