Answer:
A market for cats would have had a positive externality.
Because the cats would kill the rats on sight since that is their natural behavior.
However, it is interesting to mention, that the cat's killing has been more of a "mythic" aspect of this story, since it fails to take into account that since the black death was caused by the<em> yersinia pestis</em> bacteria, cats could have been also infected, and since their interactions with humans are greater than rats or fleas, the real outcome could have been totally unexpected.
U.s is were they where born
The correct answers are 1) the manager oversees the day-to-day operation of the city, and 3) the manager is a professional administrator.
The city manager is selected by the city council of government which is elected by people through the vote. He has the responsibility of advising the council on the decisions made but does not has formal authority to vote on laws passed by the council though, he will be the person who executes them.
According to Kevin Kruse (Nahavandi, A.,2015) a good manager is necessary to plan, measure, hire, fire, coordinate activities among other activities. Though, a manager can be useful on organizing, directing and planning, is desirable. He also becomes a leader, knowing that both notions are not necessarily the same. A leader has long-term and future-oriented perspectives and provides vision to the organization while a manager only has a short-term view and focus on routine matters.
Reference
Nahavandi, A. (2015). The art and science of leadership (7th ed.). Upper Saddle River, NJ: Pearson.
Answer: They used irrigation to bring water to crops and fields.
