Final answer:
Sheila's insistence on her sister buying a coat made from artificial fur demonstrates the strong influence of reference groups on product selection, especially with luxury items that carry ethical considerations.
Step-by-step explanation:
In the given scenario where Sheila is influencing her sister's choice of buying a fur coat, we can see the impact of reference groups on product selection. Sheila's membership in the Animal Lovers Society exemplifies how reference groups can shape individual preferences, especially regarding luxury items where ethical considerations may be at play. Therefore, the correct answer to this scenario is that: C) Where luxuries are concerned, reference group influence is strong for product selection.
This suggests that individuals often look to their reference groups for guidance on appropriate choices, which can include cultural centers, family gatherings, or social clubs. These groups help individuals form social norms and influence behaviors, often leading to the alignment of choices with the group's values, which in Sheila's case, is the ethical opposition to real animal fur.