<span>The enzyme DNA polymerase will form hydrogen
bonds with the nucleotides of the template DNA and add new nucleotides,
adenine will bond with thymine and guanine will bond with cytosine,
forming the complementary strand.
</span>
<span>3' ATGCTTGGACA 5 is the DNA template
</span><span>5' TACGAACC .......3' is the complementary strand
you
just need to join the right nucleotides. If there is no T, the DNA
polymerase has nothing appropriate to connect to the A, so it stops
there</span>
B, I would presume, would be the answer, Good luck!!