Base Pairing Between Guanine and Cytosine Is More Stable Than

Base pairing between guanine and cytosine is more stable than base pairing between adenine and thymine.Which of the following best explains why?

A) G/C base pairing involves two large purine bases,while A/T base pairing involves two smaller pyrimidine bases.
B) G/C base pairing involves three hydrogen bonds,while A/T base pairing involves only two hydrogen bonds.
C) G/C base pairs are smaller and more compact than A/T base pairs.
D) G/C base pairs are more widely separated and not as crowded as A/T base pairs.
E) G/C base pairs appear in DNA and RNA,while A/T base pairs appear only in DNA.