The Spouse of a Patient Recently Diagnosed with Early Stage

The spouse of a patient recently diagnosed with early stage Alzheimer's disease asks,"
Is there anything I can do to help delay the progression of this disease?" Which strategy has the greatest potential for preserving the protective abilities of immune cells related to the disease?

A) Minimize contact with the public during cold and flu season.
B) Enroll the patient in an exercise program that meets regularly.
C) Provide supplements to enhance the patient's immune system.
D) Identify creative ways to keep the patient mentally challenged.