Georgia used 1/3 of a yard of string to tie a ribbon. Rosie used 3/4 of a yard of string to tie a ribbon. Which pair of equivalent fractions will help them find the total amount of string that they used?

A.

1/12 & 9/12

B.

1/12 & 3/12

C.

4/12 & 9/12

D.

4/12 & 3/12