A. the japanese attack on pearl harbor
If only one company provides a service it can monopolize that sector and cause price gouging. If several companies provide a service and those companies must be competitive with each other to attract business/customers.
C. Republic
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Grenville was in favor of taxing the colonies and was famous for proposing the Stamp Act.
Grenville saw out of control spending, especially spending on the colonies, and saw a need for raising additional revenue to keep the Crown from becoming insolvent.