The Redness and Heat Associated with Inflammation

The redness and heat associated with inflammation

A) are always caused by the growth of pathogens within the inflamed area.
B) are due to the release of histamine from injured tissue; it dilates blood vessels and increases blood flow to the inflamed area.
C) can be relieved by the application of heat over the inflamed area.
D) are indicative of an impending anaphylactic reaction.