题目内容：
共用题干Obesity（肥胖）Causes Global Warming
The list of ills attributable to obesity keeps growing:Last week,obese people were accused of causing global warming.
This.____(51)comes from Sheldon Jacobson of the University,of Illinois,Us,and a doctoral student, Laura McLay.Their study_______(52)how much extra gasoline is needed to haul fat Americans around.The answer,they say,is a billion gallons of gas per year.It_______(53)an extra 11 million tons of carbon dioxide.
There have been______(54)for taxes on junk food in recent years.US economist Martin Schmidt suggests a tax on fast food__.____(55)to people's cars."We tax cigarettes partly because of their health cost,"Schmidt said."Similarly，leading a lazy lifestyle will end______(56)costing taxpayers more."
US political scientist Eric Oliver said his first instinct was to laugh at these gas and fast food arguments? But such__________(57)are getting attention.
At the US Obesity Society's annual meeting,one person__________(58)obesity、with car accident deaths,and another correlated obesity with suicides.No one asked whether there was really a cause-and-effect relationship,"The funny thing was that everyone took it.______(59),"Oliver said.
In a 1960s study,children were_________(60)drawings of children with disabilities and without them,and a drawing of an obese child.They were asked______(61)they would want for a friend?The obese Child was picked last.
Three researchers recently repeated the study_______(62)college students.Once again,__.___(63) no one,not even obese people,liked the obese person.
But,researchers say,getting__________(64)is not like quitting smoking.People struggle to stop smoking,and,in the end,many succeed.Obesity is different。Science has shown that they have limited personal control over their weight.Genes also________（65)a part?
_________51
A:study
B:project
C:experiment
D:conclusion
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