Revolutions are organised social unrest that lead to a violent upheaval of the political system. They start usually due to economic factors - famine or poverty, weak leadership, and consolidation of opposition power into a popular movement.
Answer:
He should be encouraged not to dispose such corrosive acid to the river.
Explanation:
Sulfuric acid (H²SO⁴) known as vitrol is a highly corrosive chemical and is potentially explosive in concentrated form. It would badly burn anyplant, bird,or land animal exposed to it. It has moderate chronic (long-term) toxicity to aquatic life. So Billy( plant manager) should be advised not to engage in such exercise, because it is harmful to aquatic life.
I think it will most likely be A
