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.

(A) The railroads are criticized (B) for their part in (C) settling the west (D) too rapid with its resultant economic unrest. (E) No error.