You are characterizing a new dna polymerase. when the enzyme is incubated with [32p]dna and no dntps, you observe the release of [32p]dnmps. this release is prevented by adding unlabeled dntps. which of the following describes the reactions that most likely underlie these observations?

a)the dna polymerase contains 3'-5' and a 5'-3' exonucleases that degrade dna to produce [32p]dnmps.
b)the dna polymerase contains a 5'-3' exonuclease that degrades dna to produce [32p]dnmps.
c)the dna polymerase contains a 3'-5' exonuclease that degrades dna to produce [32p]dnmps.
d)any of the above could explain these observations.
e)none of the above.