With regard to the studies of did described in your text regarding faking, amnesia, and hypnosis as well as the studies regarding the physiological changes that occur in the different personalities the most accurate statement is:

The  correct answer would be - however DID can be fake but the changes occurs physiological level in such patients is very tough to fake.

Explanation:

DID or dissociative identity disorder is a disorder is disorder which is characterized by the maintenance of 2 or more personality that are distinct and relatively enduring.

It can be faked on the suggestions and observation, It is very tough to develop the changes that a DID patient developed at physiological changes.

Thus, the correct answer is -  however DID can be fake but the changes occurs physiological level in such patients is very tough to fake.

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