Which of these is an accurate representation of the trend in active transportation to and from school over the time span from 1969 to 2001?
A. The number of students who walk or bike to school has remained relatively constant over that time span.
B. The number of students who walk or bike less than a mile to school increased by about 10% over that time.
C. The number of students who walk or bike any distance to school has decreased by about 10% over that time.
D. The number of students who walk or bike any distance to school has decreased by over 50% over that time.
Answer: D
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