One Result of Leukemia, a Cancer of the White Blood

One result of leukemia, a cancer of the white blood cells in the bone marrow, is that many immature white blood cells circulate throughout the body, but very few mature ones circulate. What effect, if any, would this have on antibody- and cell-mediated immunity?

A) T cells would attack B cells, but only cell-mediated immunity would be affected.
B) T cells and B cells wouldn't mature, and thus both types of immunity would be greatly affected.
C) There would be no effect.
D) Neutrophils would attack the bone marrow.