What is the best definition for empire?

4. any area in which one nation has power over another; i.e. - this happened to china when it was defeated by japan

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

Which of the following is a likely reason that someone today might decide to move from a city in the midwest to the south? a. the decline of manufacturing in the midwest b. the many high tech jobs available in the south c. urban overcrowding in the midwest d. higher housing costs in the south