A client with leukemia is scheduled to undergo a stem cell transplant. The client asks, "Where do the stem cells come from?" What is the nurse's best response?

A) This choice is incorrect because while aerobic exercise is beneficial for overall health, it may not directly protect the client from infection in the context of low WBC count during chemotherapy.

B) This choice is incorrect because during chemotherapy, live vaccines should be avoided as they can pose a risk to immunocompromised clients with low WBC counts.

C) This choice is correct. Placing the client in a private room with negative pressure helps reduce the risk of exposure to infectious agents, especially in immunocompromised clients with low WBC counts who are at higher risk of infection.

D) This choice is incorrect because limiting the number of healthcare providers entering the client's room may be beneficial to reduce the risk of exposure to potential infections, but placing the client in a private room with negative pressure is a more comprehensive measure.

A) This choice is incorrect because impaired bone density would not directly cause ecchymoses on the skin. It might lead to an increased risk of fractures, but not bruising.

B) This choice is correct. Ecchymoses (bruises) of varying sizes with minimal trauma are common in leukemia due to a deficiency of platelets and impaired clotting factors in the blood. Leukemia can lead to decreased platelet production and clotting abnormalities, resulting in easy bleeding and bruising.

C) This choice is incorrect because increased production of platelets would improve clotting abilities and reduce the risk of ecchymoses.

D) This choice is incorrect because elevated levels of red blood cells would not directly cause ecchymoses on the skin. It may lead to other symptoms like increased blood viscosity.