Environmental Impact. The Gold Rush had an effect on California's landscape. Rivers were dammed or became clogged with sediment, forests were logged to provide needed timber, and the land was torn up — all in pursuit of gold.
A town often becomes a ghost town because the economic activity that supported it has failed, or due to natural or human-caused disasters such as floods, prolonged droughts, government actions, uncontrolled lawlessness, war, pollution, or nuclear disasters.
I believe it is C. He used extreme violence to scare enemies into surrendering.
Take off D; the North had won some battles up to that point. Rip off A; the South would never let go of slavery. Take off B, since the Union had some wins already. You can now clearly see where the answer is.
C. By deciding what to purchase