Brigid has been diagnosed with dissociative identity disorder. brigid is the host personality. we can expect that the alter identities

a. are very much like brigid
b. are strikingly different from brigid
c. only "come out" when there is no stress in the environment
d. are very much like one another

Option (B) is correct.

Explanation:

Dissociative identity disorder is the mental and personality disorder in which a person tends to behaves in having two or more different  personalities.

Host personality persisting person in case of dissociative identity disorder has most leading personality and the other personality apart from host is called alter. Alter identity persist distinct names, behavior etc.

According to the question personality of Brigid is host and thus he cannot persist alter personalities in dissociative identity disorder.Alter cases are different from Brigid's situation.

Other options are incorrect because Brigid's case is not similar or likely with alter identity as he has host identity and can be present in stressful situation .Thus, the correct option is option(B).

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