DNA Double Helix Structure Is Stabilized by All of the Following

Multiple Choice

DNA double helix structure is stabilized by all of the following EXCEPT:

A) the sugar-phosphate backbones are oriented in opposite directions.
B) the glycosidic bonds holding paired bases are directly across the helix from one another.
C) cations such as Mg²⁺ bind to the anionic phosphates.
D) bases stack together through hydrophobic interactions and van der Waals forces.
E) appropriate base pairing builds a polymer whose external dimensions are uniform.