Answer:
A. Carbon double bonded to oxygen and a hydroxyl group (OH).
Answer: B.
Explanation:
When the electron changes levels, it decreases energy and the atom emits photons. The photon is emitted with the electron moving from a higher energy level to a lower energy level. The energy of the photon is the exact energy that is lost by the electron moving to its lower energy level.
Hope this helps!
It seems like the answer is C, you really just need to use the process of elimination.
Conduction should be the correct answer.