In DNA Replication, What Does the Enzyme DNA Polymerase Do

In DNA replication, what does the enzyme DNA polymerase do?

A) Travel along the single DNA strand, adding the correct nucleotide to the new strand
B) Move along the double strand of DNA to unwind the nucleotides of the double helix
C) Hold the double strand apart while the correct nucleotides are added to the strand
D) Transport the double strand of DNA from the nucleus to the cytoplasm for protein formation