A 10-month-old infant demonstrates object permanence by actively searching for a toy hidden under a blanket. Which nursing action best supports the infant's cognitive development at this stage?

A. Limit the infant's exposure to new toys to avoid overstimulation and confusion is incorrect because exposure to a variety of age-appropriate toys promotes cognitive development. Limiting interaction with toys may hinder problem-solving skills and learning about object permanence. B. Encourage parents to play peek-a-boo and other interactive games that reinforce object permanence is correct because interactive games like peek-a-boo help infants understand that objects exist even when out of sight, directly supporting the development of object permanence. These activities also enhance social interaction, attention span, and memory, which are critical at this developmental stage. C. Discourage exploratory behaviors such as putting objects in the mouth to prevent choking hazards is incorrect because exploratory behaviors, including mouthing objects, are a normal and important part of sensory and cognitive development in infants. While safety precautions are necessary, discouraging exploration can limit learning opportunities. D. Focus solely on physical milestones such as crawling and walking, as cognitive development is less critical at this age is incorrect because cognitive development is highly active during infancy. Milestones like object permanence, problem-solving, and early language acquisition are equally important to track and support alongside physical growth.