B, Frost Wedging. Have a good rest of your day!
Crush the limestone... it would give more area for the acid to react
D, It is a flow of protons, is the best answer. Electricity is the flow of electrons, not protons.
We wouldn't have the majority of the people around that we do now, soldiers would have bleed out on the field, people needing blood transplants due o having cancer, people in car accidents, people with brain bleeds. The population would practically be cut in half.
