Answer: Option (D) is correct
Explanation:
Economic efficiency is referred to as the situation where all commodities and factors of production residing within an economy are allocated or distributed in most efficient way in order to eliminate or minimize waste. It also implies to an state(economical) where resources are being optimally allocated in order to serve individuals or other entity in best way possible while trying to minimize inefficiency and waste.
Abraham Lincoln's primary goal was to save the Union, regardless of whatever needed to be done in order to accomplish that purpose. This quote comes from one of his famous letter, which was written in the Civil War period of the U.S., a time where the stability, peace, and unity of the country were at high risk.
3 cite evidence pretty sure of it sorry if it is wrong
Mountain ranges were a big problem because in the winter there were avalanches, it was very cold, and there was a lot of snow.