A) cannot be the right answer because the question states "quotient of a number and 5", which means that it has to be "n/5"
B) cannot be the right answer because the question states "fourteen more than the quotient", which means that it has to be "n/5 + 14"
C) cannot be the right answer because it's the same as A), it has to be "n/5"
D) is the correct answer- this is because the question states "fourteen more than...", which means that "14" has to be added to the quotient; the question also says the "quotient of a number and 5", which means it should be "n/5"