What type of fatty acid contains carbon atoms that have all their bonds full with hydrogen atoms?

Saturated fatty acids are characterized by having carbon atoms that are fully saturated with hydrogen atoms, meaning that all available bonding sites on the carbon are occupied by hydrogen. This results in a structure that is more stable and less reactive compared to unsaturated fatty acids, which contain at least one double bond between carbon atoms that reduces the number of hydrogen atoms attached.

In contrast, unsaturated fatty acids are distinguished by having one or more double bonds in the carbon chain, leading to fewer hydrogen atoms. Monounsaturated fatty acids have one double bond, while polyunsaturated fatty acids have multiple. Trans fats are a specific type of unsaturated fat that has been hydrogenated, but they still contain double bonds, which means they do not fit the definition of saturated fatty acids.

Therefore, the assertion that saturated fatty acids contain carbon atoms that have all their bonds full with hydrogen atoms is accurate, making this the correct choice.