Answer:
medical history of individuals
Roger Williams was the founder of Rhode Island. He was a very religious leader who arrived in Boston from England. Williams, with help from the Narragansett<span> tribe, established a settlement at the base of two rivers near Narragansett Bay, present day Rhode Island which was declared a place of religious freedom.</span>
Capitalism is not a system of government, but an economical system - so it can't be the correct answer.
The correct answer is" republic" - in a republic people don't exercise their power directly, but choose representatives and this is the case in the US (the representatives are for example the Congress and the President)