The Fact That the Following Molecule Serves as a Substrate

Multiple Choice

The fact that the following molecule serves as a substrate for DNA polymerase in place of dTTP proves what issue with regard to DNA replication?

A) DNA polymerase is highly error prone
B) hydrogen bonding to N-3 of thymine is not critical for substrate recognition
C) base stacking is the true driving force for nucleotide placement
D) substrate shape might be as important as hydrogen bonding for DNA polymerase
E) none of the above