Answer:
Concentrated sulfuric acid can perform a dehydration reaction with table sugar. After mixing, the color changes from white to brownish and eventually to black. The expansion of the mixture is the result of vaporization of water and CO2 inside the container.
Nier Bohr
These are the valence electrons-
And of course, all the action,
All the chemistry occurs the valence shell,
Because chemical bonds between valence electrons.
I believe the answer is C because the first two are mechanical hazards and C mentions plug which is electrical.
