Read: 'Fast food companies have dramatically increased portion sizes since the 1970s. A standard soda serving has grown from 7 ounces to over 30 ounces. Nutrition experts link these larger portions to rising obesity rates.' What inference is MOST supported?
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A
Soda was not sold in the 1970s
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B
Obesity rates have not changed since the 1970s
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C
Larger portion sizes may contribute to obesity
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D
Nutrition experts disagree about the causes of obesity