Correct Answer: C

Rationale: By 5 months, an infant's weight should typically double from birth, and length should increase by approximately 50%.

Correct Answer: A

Rationale: Breast milk provides adequate hydration, even in warm weather, so additional fluids like water are not necessary and can interfere with breastfeeding.

Correct Answer: A

Rationale: The correct answer is A: 'Avoid using any latex product.' In the case of a suspected latex allergy, it is crucial to prevent exposure to latex products to avoid allergic reactions. Choice B is incorrect because there are no truly non-allergenic latex products. Choice C is irrelevant to the situation described in the question, as the child does not have asthma. Choice D is also incorrect because desensitization is not an immediate option for managing a suspected latex allergy.

Correct Answer: C

Rationale: By 6 months, infants are usually in the stage of secondary circular reactions, where they start to intentionally repeat actions that bring pleasure or interesting results.

Correct Answer: A

Rationale: The correct answer is A: 'Industry vs. inferiority.' According to Erikson's theory, school-age children (approximately 6-12 years old) are in the stage of industry vs. inferiority. In this stage, children focus on developing a sense of competence and productivity. Choice B, 'Autonomy vs. shame and doubt,' is incorrect as it refers to the stage that occurs during early childhood (1-3 years old). Choice C, 'Identity vs. role diffusion,' pertains to adolescence (12-18 years old). Choice D, 'Trust vs. mistrust,' is related to the stage of infancy (0-1 year old). Therefore, option A is the most appropriate stage for school-age children in Erikson's theory.