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

Philosophy and education (A) have been (B) so closely related in Dewey's thought that (C) it is scarcely possible to (D) consider one part from the other. (E) No error.