Final answer:
An effective response by Charlie's aunt would be to accurately explain and follow the discharge instructions regarding the care of contact dermatitis.
Step-by-step explanation:
After giving discharge instructions regarding care of contact dermatitis, an effective response by Charlie's aunt would indicate that she has understood the teaching. This could be demonstrated by her ability to accurately explain and follow the instructions. For example, if she can correctly identify the triggers or irritants that cause her contact dermatitis and effectively avoid them, it would indicate that the teaching has been successful. Additionally, if she can properly apply any prescribed creams or ointments and follow any recommended skin care practices to manage her condition, it would further confirm the effectiveness of the teaching.