If a DNA molecule containing the base sequence 5' TACTAG 3' unzipped during replication, and replication that occurred in the direction away from the replication fork (to right) proceeded in three-base sequences, what would be the FIRST three-base sequence to be formed?
A. 5' ATG 3'
B. 3' ATC 5'
C. 5' TAG 3'
D. 3' TAG 5'
E. 5' TAC 3'