What do most Americans do with regard to privacy protection？
A. They change behaviors that might disclose their identity.
B. They use various loyalty cards for business transactions.
C. They rely most and more on electronic devices.
D. They talk a lot but hardly do anything about it.
According to what the author advocates, which of the following groups of people would be considered healthy？
A. People who have strong muscles as well as slim figures.
B. People who are not presently experiencing any symptoms of disease.
C. People who try to be as possible, regardless of their limitations.
D. People who can recover from illness even without seeking medical care.
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