D. Rosemary has complicated thoughts and motivations about the choices she makes.
This option best reflects why Rosemary would be considered a complex character. Throughout the excerpt, her interactions and inner thoughts reveal a blend of privilege, social awareness, curiosity, and a desire for meaningful experiences. Her initial reaction to the enamel box and her contemplative moment in the rain convey her materialism, but they also hint at deeper emotional yearnings and a craving for authenticity and adventure, as shown in her spontaneous invitation to the young girl. This complexity in her motivations and emotional landscape illustrates that she is not merely defined by her wealth and social status, but also by her internal struggles and desires.