For the Helix in Double-Stranded B-Form DNA, the Majority of the Stability

Multiple Choice

For the helix in double-stranded B-form DNA, the majority of the stability can be attributed to:

A) base-pairing interactions via H-bonds.
B) interactions along the phosphate backbone.
C) base-stacking interactions via van-der-Waals interactions.
D) covalent bonds between adjacent bases in one strand.
E) ionic interactions with metal ions.