Correct Answer: D

Rationale: The correct answer is 'Birth weight.' Birth weight is a crucial indicator of an infant's chances of survival and well-being. Low birth weight is associated with various health risks and developmental challenges. Birth length (choice A) is not as significant in predicting infant outcomes as birth weight. The Combined Apgar score (choice B) is a measure of the newborn's health status at birth, not a predictor of long-term survival and development. Delivery date (choice C) is important for determining gestational age but is not as directly related to infant survival and healthy development as birth weight.

Correct Answer: C

Rationale: Vision is the least-developed sense in newborn babies. While newborns can see, their vision is not as developed as their other senses at birth. Taste, sound, and touch are more developed senses in newborns compared to vision. Over time, through visual stimulation and experiences, a baby's vision gradually improves and develops.

Correct Answer: B

Rationale: Correct answer: School-age children master concrete operational tasks gradually, in a continuum of acquisition. Piaget's theory suggests that children develop cognitive abilities in stages, with concrete operational tasks being acquired gradually as part of this process. Choices A, C, and D are incorrect because concrete operational tasks are not typically mastered all at once, much later than Piaget believed, or necessarily after mastering abstract thinking.

Correct Answer: A

Rationale: The correct answer is A: 'Avoidant.' Avoidant coping refers to strategies that involve avoiding the problem and focusing more on emotions. This type of coping mechanism can often lead to negative outcomes as individuals may engage in self-blaming, impulsive behaviors, or seek escapist routes rather than addressing the issue directly. Choice B, 'Ineffective,' is a broad term and does not specifically capture the characteristics described in the question. Choice C, 'Problem-focused,' is the opposite of avoidant coping as it involves actively addressing the issue at hand. Choice D, 'Flexible,' does not align with the description provided, as flexibility in coping involves adapting strategies based on the situation, not necessarily being emotion-focused, self-blaming, impulsive, or escapist.

Correct Answer: D

Rationale: The correct answer is 'D: deficits.' Most cognitive aging research has indeed focused on deficits rather than stability, gains, or competence. Studies have consistently shown that deficits in processing speed and memory are common in aging individuals, making it a primary area of interest in research. Choices A, B, and C are incorrect because cognitive aging research primarily aims to understand and address deficits associated with aging rather than focusing on stability, gains, or overall competence.