Ace the Certified Dietary Manager (CDM) Exam 2026 – Fuel Your Future with Confidence!

Saturated fatty acids are characterized by having no double bonds between the carbon atoms in their hydrocarbon chain, which means they are "saturated" with hydrogen atoms. This structure allows them to be more stable and generally solid at room temperature. The presence of single bonds throughout the chain contributes to this solid state.

The other options describe characteristics of different types of fatty acids. For example, fatty acids that are liquid at room temperature are usually unsaturated, which contain one or more double bonds. The statement about containing one double bond pertains to monounsaturated fatty acids, and the claim regarding plant oils relates to unsaturated fatty acids that are prevalent in plant sources. Therefore, the attribute of being "filled with hydrogen" accurately defines saturated fatty acids, making it the correct choice.