Directions: The following question tests your ability to recognize grammar and usage errors. The sentence contains either a single error or no error at all. No sentence contains more than one error. The error, if there is one, is underlined and lettered. 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 choice (E). In choosing answers follow the requirements of standard written English.

It is they who buy and sell, come up with schemes for increasing their profits, curry (A) favor with rulers, deceive the scholars, farmers, (B) and artisans, and (C) are competing with each other in (D) their profit-seeking. (E) No error