FERMAT 2007 Problem 3

Of the fractions \displaystyle\frac34,\frac78,\frac{13}{16}, and \displaystyle\frac12, what is the difference between the largest and the smallest?

Answer Choices
A. \frac38
B. \frac67
C. \frac{5}{16}
D. \frac{1}{16}
E. \frac18