Parkinson's law means that the level of administrative agencies will continue to increase like a pyramid, the administrative staff will continue to swell, and everyone is busy, but the phenomenon that the organizational efficiency is getting lower and lower is caused by an incompetent official. Usually, two people who are lower than themselves are used as assistants, and the two assistants find two more incompetent assistants for themselves, and so on, forming a bloated organization. Based on the above definition, which of the following is the following item that can be explained by Parkinson's law? ['People in a poor county who are capable cannot be reused, and those with mediocre ability have a large number of overstaffed into administrative agencies, resulting in an increasing number of people in this country\'s poor county eating "royal food".', 'The factors involved in administrative management are very complicated. Managers cannot avoid goal setting and execution and never make mistakes. Managers need to be ready at all times to face errors and failures that come.', 'The promotion mechanism of an administrative department\'s "determined promotion based on contribution" has led to a considerable portion of the organization\'s personnel being promoted to an incompetent level, resulting in superfluity and inefficiency.', 'A manager gives his subordinates ample time to complete a certain task. As a result, the subordinates not only make a mess of themselves, but the entire department is also chaotic.']