Determine which two bands in the double digest make up the large A fragment. Mark the bands on the fragment line below, and indicate the size of each. These two bands represent where the B restriction site is on the fragment.
A) Band X: Size Y, Band Z: Size W
B) Band X: Size W, Band Z: Size Y
C) Band X: Size Y, Band Z: Size X
D) Band X: Size W, Band Z: Size X