Answer:
Well that depends on the person. But my personally i like running (at my own pace), butt work outs, and small weights
I think it's most likely D because when I googled the definition it said something about gas so yeah
The brain stem which is composed of the Pons, The Medulla, and the Midbrain serve a very vital function... They control the functions that keep you alive; Heart Rate, Respiratory Rate, Breathing input and output, Blood pressure, as well a vasomotor functions. So taking this into account, an injury to the brain stem is extremely bad, as that can and will most definitely be very lethal.
Bones act as levers as well as the joints connecting them.