The sentence is divided into four segments: (A), (B), (C), and (D). Identify…

The sentence is divided into four segments: (A), (B), (C), and (D). Identify the segment that contains a grammatical error. If the sentence is both grammatically and contextually correct, select “No error” as the correct answer.

The ambassador (A)/ said the reports have (B)/ being examined carefully by his staff (C)/ before making any comment. (D)