which answer choice below correctly describes the structure of DNA?
( 1 point )
A.) Sugar-nitrogen base backbone with phosphates in the middle forming a double helix.
B.) Nitrogen bases on the outside with sugar-phosphate in the middle of a double helix.
C.) Sugar-phosphate backbone with nitrogen bases coming off a single helix.
D.) A sugar-phosphate backbone with nitrogen bases in the middle forming a double helix.