As a child, Monica was criticized severely by her mother for not living up to her expectations. This criticism was always followed by a beating with a whip. As an adult, Monica is generally introverted and extremely shy. Sometimes, however, she acts like a young child, throwing tantrums if she does not get her way. At other times, She is a flirting, happy-go-lucky young woman who says her name is Connie. Most likely, Monica is suffering from:

dissociative identity disorder      

Explanation:

Dissociative identity disorder: In psychology, the term "dissociative identity disorder" is also denoted as DID, and also referred to as MPD or multiple personality disorder. It is distinguished as a mental health disorder that is being defined by the maintenance of two different (at least) and enduring personality phases or states. Dissociative identity disorder is being accompanied by "memory gaps".

Causes: Childhood abuse.

In the question above, Monica is suffering from a dissociative identity disorder.

as university of miami psychologists debra lieberman and adam smith pointed out in a recent article in the journal current directions in psychological science, humans have social and psychological mechanisms to deter incest. with very few exceptions, marriages between brothers and sisters and between parents and their children are verboten in every human culture. the primary psychological anti-incest mechanism is the yuck response. even the idea of sex with their mom or dad, bro or sis is upsetting to most people. the psychologist jonathan haidt has found that nearly everyone is repelled by the prospect of brother-sister sex, even in hypothetical situations in which there is no chance of pregnancy).

the biological cost of incest

this raises an interesting question: just what’s so bad about incest? sure, having sex with your dad or your sister seems gross — but why? some anthropologists have argued that incest taboos are learned social conventions. this explanation, however, doesn’t make sense to me as it does not explain the widespread existence of anti-incest mechanisms in creatures ranging from cockroaches to chimpanzees. second, the incest taboo is about as close to a universal law as human moral rules get.

why should mechanisms to avoid incest be so widespread both in nature and across human societies? the answer is simple. the problem with having sex close with relatives is that there is an astonishingly high chance that your offspring will be born with a serious birth defect.

it would be d). more resources must be obtained to attain that combination of goods and services