What makes an analogy effective?

What impact did improvements in farming technology near the end of the nineteenth century have on the american economy? a. more energy was needed to power equipment, creating the renewable energy industry. b. less labor was necessary on farms, leading workers to pursue other jobs. c. less money was invested in farming as many locally owned farms went bankrupt. d. more demand for agricultural products reduced the price of food and animal products.

What did the leaders of the soviet union feel would provide the most protection for their country

After having your fifteenth candy bar we can assess that you would have? a. negative utility b. high utility c. low utility d. a sixteenth candy bar