C.your perception of stress
Answer:
I believe it is C. the small intestine is longer, but the large intestine is thicker.
Explanation:
Good conductors of heat- aluminium, Iron, Lithium, Beryllium.
poor conductors- Mercury, Hydrogen, titanium, Chromium
30 minutes or so..............
I would say C, his nutrition. Maybe eating more vegetables and fruits will provide him the energy to push harder.