This is what I know the USSS (United states secret services) is under the agency of the U.S department of homeland security. Until 2003, the service was part of the U.S department of the treasury. This is also what I know the secret service is unique among the federal law enforcement agencies because not only do it's agents provide protection for the President, vice, former presidents, presidential candidates and visiting heads of state and heads of the government.
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Answer B.
They carried messages between different parts of the empire
The runners in the Inca society were called Chasqui runners and were young men used to bring messages by running between different parts of the Inca Empire.
Answer:
C) there is the land surrounding the country on all sides
Banliang, also known as bronze coins which were later turned into silver coins.
Answer: Banliang