Directions: The sentence below is divided into four parts marked (a), (b), (c) and (d). The sentence contains either a single error or no error at all. No sentence contains more than one error. Select the part having an error. If there is no error, select (d) as your answer.

(a) Captain’s language was uncompromising. (b) He told junior officers their work (c) must improve or they would be fired (d) No error