Final answer:
The nurse should plan to provide education on the risk factors for hepatitis during the group therapy session and discuss strategies to reduce those risks.
Step-by-step explanation:
The nurse should plan the intervention of providing education on the risk factors for hepatitis during the group therapy session. This can include discussing behaviors and activities that increase the risk of contracting hepatitis and strategies to reduce those risks. Additionally, the nurse can provide information on the importance of vaccination and preventive measures, such as regular testing and practicing safe injection practices. By providing this education, the nurse can help the clients in the substance abuse program make informed decisions and take necessary steps to protect themselves from hepatitis.