What emotional state does Jamie display when he grins at the end of a scene?

The choice indicating that Jamie feels happy due to his mother's invitation to Bobby is correct because grinning typically conveys feelings of joy or satisfaction. In many contexts, a grin symbolizes pleasure or positive emotions, especially when it follows an invitation from a loved one, such as a mother. This scenario suggests that Jamie's reaction is a reflection of his happiness related to being invited to engage socially, reinforcing a sense of belonging and warmth. A grin can often express excitement and anticipation, especially in the context of receiving good news or opportunities, which aligns well with the emotional state of happiness described in this choice.