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.

The new professor's lecture, while not lacking in intricate details, (A) failed to present nothing of value to the students (B) who were uninitiated and unfamiliar with (C) the profound depths of the subject matter. (D)