I could be wrong but I do believe that the answer you are searching for is A: A high-fat diet.
The integumentary system, the skin, protects the internal organs from harmful bacteria, sunlight, and injury. The skin is the largest organ of the body and consists of two layers: the epidermis and the dermis. The epidermis is the outer layer. It is made up of dead cells and new cells which make the body waterproof, give color to the skin, and help maintain the body's hydration levels.
Answer: You will have a NEGATIVE energy balance if you take in fewer calories than needed.
You need to consume the correct amount of calories in order to stay healthy or maintain a neutral energy balance, which is what’s best for you. Good luck.