Directions: The following 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 the answer, follow the requirements of standard written English.

He has (A) suffered from a (B) similar attack (C) but milder as (D) that of last year. (E) No error