Correct Answer: C

Rationale: The correct answer is C: 'self-indulgence'. Stagnation in Erikson's midlife stage refers to a lack of growth and self-indulgence, leading to a feeling of unproductiveness. This contrasts with 'role confusion' (A), which is associated with Erikson's adolescence stage, 'selflessness' (B) which is a positive trait, and 'guilt and shame' (D) which are emotions typically associated with earlier stages of development.

Correct Answer: D

Rationale: The correct answer is D. Kohlberg's moral stages are not strictly sequential but rather overlap and are more fluid, much like Piaget's cognitive stages. Choices A, B, and C are incorrect because Kohlberg's stages do not follow a neat, predictable, or highly organized pattern, as they can be revisited and experienced in varying orders.

Correct Answer: B

Rationale: According to Erikson's theory of psychosocial development, the major personality attainment of adolescence is identity. During adolescence, individuals go through a stage called 'Identity vs. Role Confusion,' where they explore different roles and develop a sense of self. Trust (choice A) is associated with the first stage of Erikson's theory, autonomy (choice C) is linked to the toddler stage, and intimacy (choice D) is a key aspect of the young adulthood stage.

Correct Answer: D

Rationale: The correct answer is Lev Vygotsky. Vygotsky emphasized the role of social interaction and cultural tools in the development of higher cognitive functions. Jean Piaget focused more on individual cognitive development stages, Ren©e Baillargeon is known for her work in infant cognition and object permanence, and Noam Chomsky is renowned for his theories in linguistics and the study of language.

Correct Answer: B

Rationale: The correct answer is B. Fraternal twins are no more alike than ordinary siblings because they share about 50% of their genes, just like other siblings. Choice A is incorrect as fraternal twins are not genetically identical. Choice C is incorrect as fraternal twins are actually the most common type of multiple offspring. Choice D is incorrect as the likelihood of fraternal twins is not affected by the number of births a mother has had.