Correct Answer: B

Rationale: The diathesis-stress model proposes that mental disorders develop from a combination of genetic vulnerability (the diathesis) and environmental stressors. Choice A is incorrect because it states that stress alone can cause mental disorders, which is not in line with the model. Choice C is incorrect as it simplifies the model to genetic factors alone causing mental disorders. Choice D is incorrect as it suggests that environmental stressors do not play a role in the onset of mental disorders, which contradicts the essence of the diathesis-stress model.

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.

Correct Answer: A

Rationale: The correct answer is A, authoritative. Authoritative parenting combines warmth and nurturing with reasonable limits and consistent discipline. This style promotes independence, self-regulation, and social competence in children, leading to healthy psychological development. Choice B, authoritarian parenting, is characterized by strict rules and harsh punishment without much warmth, which can lead to anxiety and lower self-esteem in children. Choice C, permissive parenting, involves few demands and little control, resulting in children lacking self-discipline and social skills. Choice D, neglectful/uninvolved parenting, is characterized by a lack of responsiveness to a child's emotional needs and can lead to various negative outcomes such as poor self-esteem and emotional issues.

Correct Answer: C

Rationale: The correct answer is C: Psychodynamic. The psychodynamic perspective emphasizes the role of intrapsychic conflicts, often related to unconscious processes, in the development of psychopathology. This perspective, founded by Sigmund Freud, suggests that unresolved conflicts from early childhood experiences can manifest as mental health issues. Choice A, Biological, focuses on the physiological aspects of psychopathology, such as genetics and neurobiology. Choice B, Behavioral, looks at how behavior is learned and reinforced. Choice D, Sociocultural, considers the influence of social and cultural factors on mental health.

Correct Answer: C

Rationale: Cortisol is a hormone produced by the adrenal gland that mobilizes the body to deal with stress. Therefore, choice C is the correct answer. Choices A and B are incorrect as they inaccurately describe the origin and function of cortisol. Choice D is also incorrect as it describes the action of a different type of substance, not cortisol.