Transcript:
The two reports from the Centers for Disease Control and Prevention show that efforts to encourage Americans to lose weight at least to stop putting on more weight are having little effect. Overall, 38 percent of U.S. adults are obese and 17 percent of teenagers are as well. People are considered overweight when their BMI (Body Mass Index) hits 25, and they are considered obese’ when it gets to 30. People who are obese have higher rates of heart disease, diabetes, some cancers, arthritis and Alzheimer's disease. Obesity has decreased a little among the youngest children, the researchers noted, but it's still going up among teens.
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Option 4: "The number of them continues to increase."
Explanation: The text clearly states that American teenagers are continuing to put on weight, indicating that the number of obese teenagers is indeed increasing. This aligns with the main idea of the text regarding the worsening obesity epidemic among teenagers.
Option 1: "Measures are taken to encourage them to lose weight and they are effective."
Explanation: The text states that efforts to encourage Americans, including teenagers, to lose weight are having little effect, which contradicts this option. Therefore, this option is incorrect as it implies effectiveness that is not supported by the text.
Option 2: "They have higher proportion than adults."
Explanation: The text indicates that 38 percent of U.S. adults are obese compared to 17 percent of teenagers. This means that the proportion of obese adults is higher than that of teenagers, making this option incorrect.
Option 3: "Their BMI hits 25."
Explanation: The text defines overweight as a BMI of 25 and obesity as a BMI of 30. It does not state that teenagers' BMI hits 25; rather, it discusses obesity rates without specifying that their BMI reaches this threshold. Thus, this option is incorrect.
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