With help from other enzymes, DNA polymerase acts to join nucleotides together to form a new strand of DNA. During normal DNA replication at a replication fork, where does DNA polymerase act?

A.
along only one strand of DNA, where it produces the complementary strand

B.
along both strands of DNA, where it produces complementary strands for each of the original strands

C.
along the histones, or binding proteins, where it helps DNA uncoil and allows it to attract complementary base pairs

D.
in the cytoplasm, where it attracts individual complementary bases and then binds them together