When Considering How a Patient Is Likely to Respond to a Nonpharmaceutical

When considering how a patient is likely to respond to a nonpharmaceutical treatment for pain, a nurse understands that according to gate control theory,

A) The hypothalamus can open and close the gate in relation to stress and anxiety.
B) Stimulation of the narrow nerve fibers closes the gate, reducing pain.
C) Endorphins help to close the gate, reducing pain.
D) One should not immediately rub an injured body part because that can increase pain.