The sentence is at the bottom what’s the answer to this question

How was classical persia's extensive network of roads important to its civilization?

This document provides the framework for the united states government. it consists of three main parts: the preamble, seven articles, and 27 amendments.

Why might collective bargaining fail, causing a union to go on strike? a the union agrees with the boss about wages. b the boss compromises about work hours. c the factory goes out of business, causing the workers to lose their jobs. d the boss refuses to address dangerous working conditions in the factories.