Answer:
Commercial v.s. Subsistence: This is a commercial based agriculture that producers for both local consumers and large corporations which buy these products in bulk. Farmers themselves do not live off their product in commercial gardening.
The Great Wall of China, built more than 2,000 years ago, stands as one of the monumental feats of ancient engineering. But before the Great Wall, warring Chinese dynasties built many other walls for protection. There are 7,000 watchtowers, blockhouses for soldiers, and beacons to send smoke signals. Nineteen walls have been built that were called the Great Wall of China. The first was built in the 7th century BC.
The Bolsheviks renamed their party<span> to the </span>Communist party<span> since this was the word that Karl Marx used to describe a classless society that would exist after workers had seized power</span>
The WPB or War Production Board set the products that would be needed for war and they determined their pricing.
So I agree with you, the answer is A.
But I must admit I was a bit iffy between A and D but I'd still say that A is a better choice.
Hope this helped