An Older Client Asks the Nurse Why "People My Age

An older client asks the nurse why "people my age" have weaker immune systems than younger people.What responses by the nurse are best? (Select all that apply.)

A) "Bone marrow produces fewer blood cells."
B) "You may have decreased levels of circulating platelets."
C) "You have lower levels of plasma proteins in the blood."
D) "Lymphocytes become more reactive to antigens."
E) "Spleen function declines after age 60."