The author's regards this fiend in adolescent consumption in the United States with

A．American young people are not allowed to get loans from the bank unless they have personal assets.
B．Adolescent consumption reached an unprecedented level last year.
C．Almost all American adolescents work on a part-time basis one time or another.
D．American adolescents find it hard to get by only with the allowances their parents give them.

A．bacteria are easier to detect.
B．bacteria are harder to eradicate.
C．viruses are extremely poisonous.
D．viruses are found only in hot climates.