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

Distressing dreams and flashbacks are well-known (A)/ symptoms of post-traumatic stress disorder, (B)/ a mentally health condition that often affects (C)/ individuals who have witnessed a terrifying event.(D)/ No error (E)