Fats and Oils Are Structurally Both Triacylglycerols,but Fats Are Solids

Fats and oils are structurally both triacylglycerols,but fats are solids at room temperature and oils are liquids at room temperature. Which statement best describes the reason for their difference in physical state?

A) Fats are simple triacylglycerols and oils are mixed triacylglycerols.
B) Oils are simple triacylglycerols and fats are mixed triacylglycerols.
C) Oils contain longer fatty acid chains than fats do,and therefore have higher melting points than fats.
D) Fats contain a higher percentage of saturated fatty acids than oils do,and therefore have higher melting points than oils.