Directions: The following sentence tests your ability to recognize grammar and usage errors. 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 answer, follow the requirements of the standard written English.

The obstacles (A) to which Gandhiji (B) had to surmount were (C) mostly (D) on moral and spiritual grounds. (E) No error