Aromatic compounds are A. cyclic compounds B. aliphatic compounds C. saturated compounds D. All of the above

The correct answer is A. cyclic compounds.

Aromatic compounds are cyclic compounds that have a conjugated pi system. This means that the pi electrons in the molecule are delocalized over the entire ring, which makes the molecule more stable. Aromatic compounds are often colored, and they have a characteristic smell.

Aliphatic compounds are open-chain compounds that do not have a conjugated pi system. They are typically less stable than aromatic compounds.

Saturated compounds are compounds that do not have any double or triple bonds. They are typically more stable than unsaturated compounds.

Therefore, the correct answer is A. cyclic compounds.