Directions: The sentence contains either a single error or no error at all. The sentence does not contain more than one error. If the sentence contains an error, select the 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.

The selection of products available through (A) mail (B) order companies (C) are large and (D) varied. (E) No error