According to Fryar et al.(2012),there has been a steady increase of childhood obesity rates in the U.S.since the 1970s,with a ________ of childhood obesity rates.since 2005-2006.

Question

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The question states that there has been a "steady increase" of childhood obesity rates since the 1970s, and the options only provide for either an increase or a decrease. Therefore, choices C and D (a slight or sharp decrease) can be immediately eliminated. The phrase "since 2005-2006" indicates that there has been a change in trend from the previous period, and since the overall trend has been an increase, the only logical choice left is B - sharp increase.

According to Fryar Et Al