answer A is the correct answer :)
The worst part of political machine is the corruption.it was complete and absolute throughout the entire machine.everybody got their cut-except the avarage citizen.
Lincoln was going to protect the slaves states as they were but not allow any more, imposed martial law in Maryland and to continue in firmness and fairness.
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.
