Which of the Following Describes a Lipid

Which of the following describes a lipid?

A) A group of molecules that contain both a carboxylic acid and amine functional group.
B) A relatively small, water-soluble molecule that contains either a ketone or an aldehyde functional group.
C) A group of small organic molecules that are insoluble in water.
D) And ester of phosphoric acid where one or more of the ionizable hydrogen atoms has been replaced by an R group.
E) A molecule that contains C, H, and N and exhibits Brønsted base behavior