What are three steps on how a white blood cell find, eats and kills foreign microbes ?

When the body detects these special chemical structures, it activates several processes that lead to the destruction of the bacterium. These processes include increased movement of blood cells to the place where the invader has entered the body, increased phagocytosis (eating) by blood cells and activation of enzymes in the blood that can create holes in bacteria and hence destroy them.

Im like 95% sure the answer is b