The statement "Endorphins are generated in the body during exercise, which leads to better emotional health." would be true.
"C"
Chicken pox have nothing to do with breathing.. unless you get it from someone else who's chicken pox are contagious.
B is the best answer since public health policies reduce probabilities of diseases. It is not an obligation to provide vaccination since these are costly but these will be made readily available as much as needed and can be provided.
