Answer
The correct answer is option B.
The most important way in which Greeks influenced American Democracy was by allowing citizens to participate in government.
Explanation
The United States of America gained independence in 1776 from England. It is in this context that Greeks influenced the founding fathers of America to adopt democracy which gave the scope for its citizens to participate in the formation of the government. The ancient Greece is known to bas the first every country to create Democracy and practice it.
Further Explanation
Democracy is derived from the Greek words demos which mean people and kratos which mean rule, suggesting that the democracy is the form of the government which had the rule of the people. The U.S. democracy is said to have been inspired from the ancient Greece where the Rule of Law was practiced, written Constitution was in its place, voting system was in practice and the city-state community structure of polis was in place.
Thus the democracy is said to be heavily inspired by the first ancient Athenian democracy which was developed around fifth century B.C.E. However unlike Athens (the ancient Greek city) U.S.A has a representative democracy instead of direct democracy.