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

Multiple Choice

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.