The correct options are
A use of spices
B packing oily food in nitrogen gas
D adding anti-oxidants
Rancidity is the decomposition of oils, fats and lipids. It normally happens when food items are stored for a long time and gets exposed to oxygen. Rancidity can be prevented by adding anti-oxidants, vacuum packing, replacing air with nitrogen, refrigeration of the food-stuff, or packaging of food items in airtight containers.