The answer is C is b/c sun exposure is completely natural unlike the followin answers.
Its main function is to act as a barrier to protect the body from the outside world. It also functions to retain body fluids, protect against disease, eliminate waste products, and regulate body temperature.
Take prenatal vitamins with folic acid.
Maintain a healthy weight
Avoid alcohol, cigarettes, and illegal drugs.
Eat healthy food.
Take the day off. Even though she may feel better the symptoms may come back.