The sun moves about 1 degree to the east every (one earth) day relative to the stars. It takes the Sun one year (365.25 earth days) to make a full circle and return back to its original spot.
The correct answer is - A) subsistence farming.
Subsistence farming is the type of farming that is mostly practiced in the less developed countries. In here we have production that is just about enough for the needs of the country (and big portion of the production doesn't even come out on the home market, but you eat what you produce, or trade with someone you know). Also this type of farming is still based on primitive tools and is heavily dependant on the climate, and that makes it very unstable and more often than not people are starving because not enough food has been produced.
If the air temperature at sea level is 20 degrees Celsius, the temperature at 3000 meters will be approximately 7 degrees C.
Communism did take over I believe