Pol I Is Proteolytically Cleaved to Yield the ____,Which Lacks $\to$

Pol I is proteolytically cleaved to yield the ____,which lacks 5' $\to$ 3' exonuclease activity.

A) Klenow fragment
B) Klentaq1 polymerase
C) Okazaki fragment
D) ligase
E) primase