If a Patient Has the Diagnosis of Dissociative Amnesia, How

If a patient has the diagnosis of dissociative amnesia, how will you answer questions from family members when they ask about the disorder's cause?

A) There is no evidence of an organic cause.
B) The disorder is most likely due to a tumor that can be dangerous.
C) The disorder is due to a slow-growing tumor that can be treated with drugs.
D) The disorder was probably caused by a blow to the head but it will not have long-lasting consequences.