Watson and Crick Elucidated the Structure of DNA in 1953

Watson and Crick elucidated the structure of DNA in 1953. Their research built on and helped explain the findings of other scientists, including

A) Scientists who recognized that a nucleotide consisted of a sugar, a phosphate, and a nitrogen- containing base.
B) X- ray diffraction studies by Rosalind Franklin and Maurice Wilkins.
C) Chargaff's rules: C = G and T = A.
D) All of the above were important considerations in the elucidation of the structure of DNA.