More and more law firms specializing in corporate taxes are paid on a contingency-fee basis. Under this arrangement, if a case is won, the firm usually receives more than it would have received if it had been paid on the alternate hourly rate basis. If the case is lost, the firm receives nothing. Most firms are likely to make more under the contingency-fee arrangement. Which of the following, if true, would most strengthen the prediction above? ['Since the majority of firms specialize in certain kinds of cases, they are able to assess accurately their chances of winning each potential case', 'Some litigation can last for years before any decision is reached, and, even then the decision may be appealed.', 'Firms working under the contingency-fee arrangement take in fewer cases per year than do firms working under the hourly rate arrangement.', 'Firms that work exclusively under the hourly rate arrangement spend, on average, fewer hours on cases that are won than on cases that are lost.']