The correct option is C Both A and B C. Both A and B
Reason: Vasomotor nerves are the nerves of the autonomic nervous system that control the diameter of blood vessels. It contains both sympathetic and parasympathetic nerves. Vasoconstrictor nerves, decrease the diameter of blood vessels (vasoconstriction) whereas vasodilator nerves increase it (vasodilation). So the correct option is C.
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