When this single strand binds to a complementary DNA strand to form a B-DNA structure,

• A. half the base-pairs will be A-G pairs and half will be C-T pairs.
• B. each base will form at least two hydrogen bonds with a base in the opposite strand.
• C. the two strands will form an antiparallel left-handed helix with 12 basepairs per turn.
• D. there will be covalent phosphodiester bonds between the two strands.