Directions: The following sentence tests your ability to recognize grammar and usage errors. The sentence is divided into four parts. Each part is lettered and one of these contains an error. The sentence does not contain more than one error. If the sentence contains an error, select the lettered part that must be changed to make the sentence correct. If the sentence is correct, select choice (E). In choosing your answer, follow the requirements of standard written English.

The (A) acquiring a really good (B) knack of (C) public speaking (D) is a matter of patient effort. (E) No error