I think it might be A. i am not totally sure though
Saturated fats are when fatty acid contains carbon that are connected by a single bond. Unsaturated fats are when one or more carbons form a double bond with another carbon.
In chemistry, a valence electron<span> is an </span>electron<span> that is associated with an atom, and that can participate in the formation of a chemical bond; in a single covalent bond, both atoms in the bond contribute one </span>valence electron<span> in order to form a shared pair.
hope this helps!</span>
B. they are cyclic
i looked up the characteristics and it said aromatic hydrocarbons have cyclic molecules