Correct Answer: C

Rationale: The correct answer is C: 'polygenic.' Mental disorders are polygenic, which means they are influenced by multiple genes. This term specifically refers to conditions or traits that are caused by more than one gene. Choice A, 'environmental,' is incorrect as it doesn't directly refer to the genetic influence on mental disorders. Choice B, 'chemical circuits,' is incorrect as it is too specific and not a common term used to describe the genetic basis of mental disorders. Choice D, 'probabilistic,' is incorrect as it relates more to the likelihood or chance of something happening rather than the genetic influence on mental disorders.

Correct Answer: B

Rationale: Object-relations theory is a psychodynamic theory that focuses on how individuals interact with others and their internalized relationships. Choice A is incorrect because object-relations theory goes beyond observable behaviors to explore internalized relationships. Choice C is incorrect because object-relations theory does not primarily emphasize cognitive processes. Choice D is incorrect because object-relations theory is not a cognitive-behavioral theory focused on changing thought patterns.

Correct Answer: A

Rationale: Freud believed that anxiety was a primary causal factor in the development of most forms of psychopathology. Anxiety, according to Freud, arises from conflicts within the mind, particularly conflicts between the id, ego, and superego. This unresolved conflict can lead to various psychological issues. While depression can be a symptom of psychopathology, Freud emphasized anxiety as a more foundational element. Unresolved conflicts between the ego and the superego are related to Freud's structural model of the mind but are not the primary causal factor in psychopathology. Fixation in the oral stage is a concept from Freud's psychosexual stages of development and is not directly linked to the causal role in the development of most forms of psychopathology.

Correct Answer: C

Rationale: Freud's important contribution was that he applied the same principles to both normal and abnormal behavior. This approach allowed for a comprehensive understanding of human behavior without creating a rigid distinction between normal and abnormal psychology. Choice A is incorrect because Freud's theory did not primarily focus on the role of women in society. Choice B is incorrect as Freud's theories were largely based on clinical observations and case studies rather than experimental evidence. Choice D is incorrect as Freud's theory emphasized the unconscious mind and conflicts rather than solely focusing on positive growth for individuals.

Correct Answer: C

Rationale: The correct answer is C: 'Interaction between genetics and environment.' The genetic study of identical twins reared apart helps in understanding how both genetics and environment play a role in shaping an individual's traits and behaviors. This type of study allows researchers to tease apart the effects of genetic inheritance from those of environmental influences. Choices A, B, and D are incorrect because the study of identical twins reared apart specifically focuses on the interplay between genetics and environment, rather than solely on differences in brain function, genetic influence on behavior, or the role of environmental factors alone.