The answer is: C. Not to try and fix them all, but also not participate in them
Thoreau just want people to know that evil exist and there we might not be able to eliminate them completely. By knowing this, we can always prepare ourselves to take care of evils when we need but not completely lose our mind over it. Simply by choosing not to participate is often enough because the more people do it, the less evil would exist in this world.
Congress reapportion house seats among the state every ten years by the census that is taken to decide what states gain representatives and what states lose representatives.
Construction hunting oils drilling pollution
The systematic and objective study of human society is known as Sociology