A．Yes,there is plenty of evidence．
B．Of course,there is some evidence to show this is true．
C．There is hardly any scientific evidence to support this．
D．We don't know because the information is not given．

A．ate more food and had more physical activities
B．ate less food but had more activities
C．ate less food and had less physical exercise
D．had more weight problems

A．fat people eat less food and are less active
B．fat people eat more food than slim people and are more active
C．fat people eat more food than slim people but are less active
D．thin people run less,but have greater increase in food intake