A survey of randomly selected college students found that 58 of the 90 freshmen and 61 of the 125 sophomores surveyed had purchased used textbooks in the past year. Assume that the samples are independent and that they have been randomly selected. Construct a 98% confidence interval for the difference in the proportions of college freshmen and sophomores who purchased used textbooks.

Choose the best answer below:

A. (0.511, 0.777)

B. (0.486, 0.803)

C. (0.024, 0.777)

D. (0.486, 0.777)

E. (-0.001, 0.314)