阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项。
Scientists fear rising energy bills may lead to an increase in obesity （肥胖） after discovering a link between poorly-heated homes and higher body -fat．
Researchers from the University of Stirling’s Behavioural Science Centre set out to explore claims that warm indoor temperatures have contributed to rising obesity levels in winter．Instead, the team found that people who live in well-heated homes are more likely to have low body mass index （体重指数） levels while those who keep their heating turned down or off tend to be heavier．
Dr Michael Daly, behavioral scientist and senior lecturer, said: "We set out to investigate the scientific claims that cooler indoor temperatures help us maintain a healthy weight by pushing our bodies to use up more energy. In fact, the research suggests people may eat less and burn more energy when in a warmer indoor environment．
