Some people use simple adders, and some people use complex computers. Using computers can complete more calculations in less time than using adders. Assuming that the two machines are the same price, then, People who use computers generally make more money per hour than people who use adders. Which of the following hypotheses makes the conclusions of the above argument logical? ? ['Generally speaking, accounting differs based on the number of calculations they make and the amount of money they earn.', 'The more time an accountant spends at work, the more money he earns.', 'The more calculations an accountant completes, the more money he earns.', 'The more accurate a calculation performed by an accountant, the higher the asking price per hour.']