A system-wide county school anti-smoking education program was instituted last year. The program was clearly a success. Last year,the incidence of students smoking on school premises decreased by over 70%.
Which of the following, if true, would most seriously weaken the argument above?
A) The author of the statement is a school system official hoping to generate good publicity about the program.
B) Most students who smoke stopped smoking on school premises last year but continued to smoke when away from school.
C) Last year, another policy change made it much easier for students to leave and return to school grounds during the school day.
D) The school system spent more on anti-smoking education programs last year than it did in all previous years.
E) The amount of time students spent in anti-smoking education programs last year resulted in a reduction of time available for sports.
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