Which of these sentences is written correctly?

a. that dog gets fatter every day."> a. that dog gets fatter every day. b. the closet keeps getting more fuller."> b. the closet keeps getting more fuller. c. the family next door is the most loudest in the neighborhood."> c. the family next door is the most loudest in the neighborhood. d. the most quickest way to feel better is drink water."> d. the most quickest way to feel better is drink water.