Directions: The given sentence is divided into four parts A, B, C, and D. Choose the part that contains an error as your answer. If the sentence is error-free, mark 'No error' as your answer.

In my exhaustive search through every corner of the house, (A) meticulously retracing my steps and painstakingly scanning (B) every nook and cranny, I have come to the realization (C) that I can't find my keys nowhere. (D)