Final answer:
An 8-9-month-old infant is expected to transfer objects between hands, cling to parents and cry around strangers, and use a crude pincer grasp with their thumb and index finger. Correct option is c.
Step-by-step explanation:
By about eight to nine months of age, an infant typically exhibits several developmental actions. They can transfer objects from one hand to the other, which indicates an improvement in their hand-eye coordination.
Additionally, they may cling to their parent and cry when approached by a stranger, showcasing the formation of attachment with their primary caregiver. Furthermore, they can use their thumb and index finger in a crude pincer grasp, enabling them to pick up objects with more precision.