Direction: A statement has been divided into five parts-(A), (B), (C), (D), and (E). Part (E) is fixed and grammatically correct. Out of the other parts, only one is without error. You are required to find the error-free part and mark it as your answer. If none of the parts have error, mark- 'No error' as your answer.

The only bigger question mark in(A)/that theory, however, were (B)/the fact that scientists did not(C) /knew of the existence of(D) /any such lake in that area.(E)