Which of the following explains how the termination of DNA replication in E.coli occurs?

A)Tag protein binds the oriC locus on the DNA and acts as a helicase.
B)Ter protein binds the tag locus on the DNA and acts as a polymerase.
C)DnaC protein binds the DnaG locus on the DNA and acts as a gyrase.
D)Tus protein binds the Ter locus on the DNA and acts as contrahelicase.