我觉得这题开始时没理解是没想通这个问题,也许我笨但还是说说,可能有人会和我有一样的卡壳
it is the two additional working hours (overtime) lead to a higher productivity. As the rest people working 8 hours are left, those working for ten hours can be free of disturbance.If both two kind of employees are all at work, during these 8 hours people are bothered, no matter working for 8 or ten hours.
Therefore, C has a hidden information, once people are working together, they constantly disturb each other.
Then here comes to the most critical part: once all the people work for ten hours a day, they will disturb each other for all the ten hours, the situation is not different from that of 8 hours a day, so no productivity improvement. |