Answer: Rosalie might frown, stare or look away from Mary
Explanation:
Infants tend to engage with people through expression by responding them.Expression shown by any person attract them in terms of responding to them through expression .They lose interest in the person who is giving blank response or expression.
According to the question ,Rosalie may end up glaring at her mother with frowning , worrying or excitement reaction or might look away from seeing blank reaction of Mary.
