Final answer:
Heat application can help relieve the pain and swelling in joints affected by rheumatoid arthritis.
Step-by-step explanation:
The most appropriate response by the nurse would be:
a) Heat application can help relieve the pain and swelling.
Applying heat to the affected joints can provide relief from pain and reduce swelling in rheumatoid arthritis. Heat helps to increase blood flow to the area, which can promote healing and reduce inflammation. Examples of heat applications include warm compresses, warm baths, or using a heating pad.