Vasodilation and capillary permeability might be helpful in an immune reaction because
A. the bacteria have a harder time getting into the bloodstream.
B. vasodilation and increased permeability allow immune cells to exit the blood and fight bacteria in the tissues.
C. the resulting tissue swelling pushes bacteria out of the cut.
D. vasodilation and increased permeability allow pro-inflammatory chemicals to become concentrated at the site of the infection.