What percentage of children remain obese/overweight in adulthood?

Which of the following is an example of a survey method?

personal interviews IQ test scores height/weight statistics school grades

If someone wanted to advocate for reducing negative stereotypes against people who seek treatment for mental illness, what would be an effective strategy?

a. Work to educate the public about the nature of mental illness b. Raise money so that therapy could be available to all c. Ensure that discussion of mental illness remains private d. Make generic prescription drugs available to all