Directions: The sentence contains either a single error or no error at all. 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). While choosing answer, follow the requirements of standard written English.

Scarcely (A) had he (B) gone (C) than a policeman knocked (D) at the door to enquire about his whereabouts. (E) No error