By age 2, children __________.

Correct Answer: C

Rationale: By age 2, children are capable of adjusting their speech to fit the age of their listeners, showing early social cognition. Choice A is incorrect because taking turns in face-to-face interaction typically develops later in childhood. Choice B is incorrect as the ability to infer a speaker's indirectly expressed intention is a more advanced skill not typically seen at age 2. Choice D is also incorrect as children at age 2 are not developmentally ready to adjust their speech based on the social status of their listeners.

Correct Answer: C

Rationale: Corrected Rationale: Language development plays a crucial role in emotional self-regulation in preschoolers. It enables children to express and manage their emotions effectively. Choices A and B, permissive and authoritarian child rearing styles, focus more on the parenting approach rather than the child's intrinsic development. Family size, as mentioned in choice D, does not directly contribute to gains in emotional self-regulation.

Correct Answer: C

Rationale: The correct answer is C: 'have not borne children.' Women who have not borne children may experience menopause earlier due to lower levels of certain reproductive hormones. Having two or more children (choice A) is not typically associated with reaching menopause earlier. Smoking (choice B) is known to have negative effects on menopause but does not necessarily cause it to happen earlier. Borne twins (choice D) is a specific scenario and not a general factor influencing the timing of menopause.

Correct Answer: A

Rationale: Vygotsky viewed make-believe play as the ideal social context for fostering cognitive development in early childhood. Make-believe play encourages children to explore various roles and scenarios, promoting cognitive and social development. Sensorimotor play focuses on physical interactions with the environment, while block play involves building and construction activities. Parallel play refers to children playing alongside each other without direct interaction, which is not the type of play Vygotsky emphasized for cognitive development.

Correct Answer: B

Rationale: A circular reaction is a process where an infant repeats a specific action to explore and learn about the environment through their own motor activity. This repetition helps the infant to understand the consequences of their actions and build cognitive schemes. Sensorimotor reflex (choice A) refers to automatic responses to stimuli, not a purposeful repetition of actions to learn. Mental representation (choice C) involves internal cognitive structures to represent objects or events in the mind, which is different from the repetitive behavior described in the question. Goal-directed behavior (choice D) is purposeful and intentional, unlike the repetitive nature of circular reactions in infants' learning process.