Given the task definition and input, reply with output. In this task, you are given a context and four options. Each option is a suggested ending for the context. You should read the context and pick the best ending for the context. Please answer with "A", "B", "C", and "D". 

[header] How to act toward someone with dissociative identity disorder [title] Know the symptoms. [step] Did is characterized by the presence of alternate identities, often referred to as alters. These identities are often complex, with their own unique histories and physical and behavioral traits. <sep> (A) To deal with an altered or previously dissociated person, you should know the signs that continue to persist or can build further problems. [title] Know the characteristics of dissociative symptoms. (B) For example, if you have heterosexuality, then you would describe this disorder " conformity ", meaning not holding one of the two identities to an individual's like baggage. [substeps] Alters occur because someone with a significant other, such as a grandparent or friend, is not who they claim to be. (C) For example, an adult may have a child alter. You may notice changes in voice and physical movement, in addition to changes of attitude and preferences. (D) [substeps] This person may insist on calling themselves " his parent " or " the best in my life. " such exaggerated symptoms might be signs of a mental disorder, like borderline personality disorder, which causes the person to become overtly resistant to life change and self-care.

C