AMC 12A 2009 Problem 3

What number is one third of the way from \dfrac{1}{4} to \dfrac{3}{4} ?

Answer Choices
A. \dfrac{1}{3}
B. \dfrac{5}{12}
C. \dfrac{1}{2}
D. \dfrac{7}{12}
E. \dfrac{2}{3}