Answer:
Given that Sally is a ten-month-old infant in this scenario, her behavior is likely to align with her cognitive development at that age. The most appropriate response would be:
a. She will cry until somebody helps her find the fifth item.
Step-by-step explanation:
At ten months old, infants may not have developed a full understanding of object permanence or the ability to systematically search for hidden objects. Instead, they often rely on expressing their needs and frustrations through crying, especially when faced with discrepancies like expecting to find five items but only discovering four.