All of the bots are deleting perfectly fine questions on my phone. :(

Which of the following was probably the most difficult challenge facing construction of the railroad?

The three estates social system in france ensured balanced representation of all people and treated each social group fairly. true or false ? why?

Which of these is not a criticism of the concentric zone model? it does not accurately describe cities after the rise of suburban development. it only applies to cities that grew after the development of the automobile. it assumes that inner-city areas will always be repurposed instead of abandoned. it places too much importance on the traditional central business district.