A fertilizer company wants to determine the effectiveness of its new fertilizer on common garden plants. The company obtains a batch of seeds that are all of the same variety and produced at the same time by the same seed producer. They plant all the seeds in same-sized pots with similar soil and construct an environment ensuring that each plant is exposed to identical levels of water, light, and temperature. Half of the plants, chosen at random, are also treated with the new fertilizer. After several weeks, the plants treated with the fertilizer grow faster and larger, producing more fruit than the unfertilized plants. Upper Scenario involves which scientific method?
a. Prospective study
b. Controlled experiment
c. Retrospective study
d. Correlational method

Norman jones, an economic historian at the university of utah, has described the views of the ancient greek philosopher aristotle on interest: aristotle defined money as a good that was consumed by use. unlike houses and fields, which are not destroyed by use, money must be spent to be used. there- fore, as we cannot rent food, so we cannot rent money. moreover, money does not reproduce. a house or a flock can produce new value by use, so it is not unreasonable to ask for a return on their use. money, being barren, should not, therefore, be expected to produce excess value. thus, interest is unnatural. what did aristotle mean in arguing that money is “barren”? why would money being barren mean that lenders should not charge interest on loans? do you agree with aristotle’s reasoning? briefly explain.