The Compound Shown Below Is a Substance Called Capsaicin, Found

The compound shown below is a substance called Capsaicin, found in varying concentrations in several varieties of hot peppers, and responsible for their respective degrees of "heat". Which functional groups are present in the molecule of capsaicin?

A) alkene, ketone, amine, alcohol, ester
B) alkene, ketone, alcohol, ether
C) alkene, amine, phenol, ether
D) ether, phenol, alkene, amide
E) ester, phenol, alkene, amide