C. Nucleic Acids
DNA and RNA both have the following commonality:
They contain Nitrogen bases A,C, and G. Their Subunits are Nucleotides and the Nucleotide components are sugar, base, phospate. Both also have chainlike molecules.
The genetic information they carry in their nucleic acids (DNA or RNA) is limited for production of their own viral components or "body parts" and these parts are capsid, nucleic acids and envelope (for enveloped viruses).