What of the Following Will Fill Properly the Blanks in the Sentence

What of the following will fill properly the blanks in the sentence. Lipids are classified according to ___,and they include ___ structural types.

A) their structure; two
B) their melting temperature; fats and oils.
C) their melting point; triglycerides and phospholipids.
D) the physical operation done to isolate them; a variety of
E) their structure; only terpene and steroid.