In the last sentence from the first paragraph of the passage, what does brevity mean?

Why do you think so many u.s. government buildings reflect greek and roman architecture?

Of those who attended the philadelphia convention, which of the following traits would be least likely to be found? a. many were highly educatedb. all were menc. many were from the urban centersd. many came from the western frontiers

The information box says that the han added 4,000 miles of wall.refer to the mileage scale.how can this be true?