Why Is It Recommended That Unprocessed Oils Be Stored in Airtight

Why is it recommended that unprocessed oils be stored in airtight containers?

A) Exposure to the air will decrease the likelihood of rancidity
B) Airtight storage destroys the natural antioxidants in the oils
C) Points of unsaturation in their molecules are vulnerable to oxidation
D) This prevents hydrogenation, which makes them less healthful
E) This allows the oil to be stored long-term without additives