The Assembly of The $\beta$ Clamp Around the DNA Requires a Multisubunit _______ That Is

The assembly of the $\beta$ clamp around the DNA requires a multisubunit _______ that is also part of the ________;part of this structure opens the ______ so that it can fit around the DNA.

A) clamp loader,polymericon, $\beta$ clamp
B) clamp loader,DNA polymerase III holoenzyme, $\beta$ clamp
C) DNA polymerase III holoenzyme,clamp loader,replicon
D) $\beta$ clamp,DNA polymerase III holoenzyme,clamp loader
E) clamp loader, $\beta$ clamp,DNA polymerase III holoenzyme