DNA polymerase I and DNA polymerase III both have _____ activity, but only DNA polymerase I has _____ activity.

A)5' $\rightarrow$ 3' exonuclease; 3' $\rightarrow$ 5' exonuclease
B)5' $\rightarrow$ 3' polymerase; 3' $\rightarrow$ 5' polymerase
C)3' $\rightarrow$ 5' polymerase; 5' $\rightarrow$ 3' polymerase
D)3' $\rightarrow$ 5' exonuclease; 5' $\rightarrow$ 3' exonuclease
E)5' $\rightarrow$ 3'polymerase; 3' $\rightarrow$ 5' exonuclease