Four-year-old D'Andre is upset when his friends exclude him from a game. D'Andre sits in the sandbox alone and plays with the dump truck instead. D'Andre is displaying

Research has proven a link between ASDs and childhood immunizations

Indicate whether the statement is true or false

The observation that the incidence of obesity has greatly increased over a few decades is unlikely to be due to

a. some innate aberration of metabolism. b. increased exercise awareness of our citizens. c. rapid changes in the gene pool. d. smaller portions provided by fast-food restaurants. e. the fact that we require fewer calories as we get older.