【正确答案】 A、E

【答案解析】As a representative sample, 1,175 randomly selected adults in the Bay Area were interviewed by telephone between November 11 and December 22, 2003. This includes 292 parents with children in Kindergarten through the 12th grade. They are divided into several groups according to their age, race, income, and education background. They were asked to answer questions about their basic physical condition and knowledge of obesity. The interviewing was conducted by International Communications Research of Media. The survey's margin of sampling error is plus or minus 3.4 percentage points overall.