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.
Jerome C. Wakefield, psychologist at the School of Social Work at Columbia University criticized the (then popular) definition of psychological disorder as “statistically unexpectable distress or disability”. In his view, this definition failed to capture the idea of dysfunction. To Wakefield, a dysfunction is a condition in which some internal mechanism is not functioning in the way it was designed to function. He proposed this definition in 1992.
Answer:C.) people and organizations become better at their tasks as the tasks are repeated
Explanation: Repetitive or repeated performance of certain duties, roles or chores is believed to impact an individual's ability or rate of performance in those roles. Learning curve may be seen as a premise which holds that an individual will only get better with repeated engagement in a certain task or role. This improvement in task or performance is down to experience gained from being conversant with the process of the task and the ability to delineate the probable outcome as one becomes used to the process associated with such task.
