This is a Compund-complex sentence
Three They are all pretty un-important to the rest of the story. Why didn't you just google this?
The answer is A by the way Can I get branliest
Answer:
Laughter decreases stress hormones and increases immune cells and infection-fighting antibodies, thus improving your resistance to disease. Laughter triggers the release of endorphins, the body's natural feel-good chemicals. Endorphins promote an overall sense of well-being and can even temporarily relieve pain
Explanation: