Directions: The following sentence tests your ability to recognize grammar and usage errors. The sentence contains either a single error or no error at all. If the sentence contains an error, select the one underlined part that must be changed to make the sentence correct. If the sentence is correct, select option (E). While choosing answer, follow the requirements of standard written English.

(A)There is some sort of a (B) gradation system which make (C) a connection between the size of the purchase and (D) the level of prize that one is eligible for. (E) No error.