Agovernment's desire to conquer areas beyond its border for wealth and strength is an example of:

nationalism
imperialism
sectionalism
isolationism

Imperialism

Imperialism is the action of extending a country's power, influence and dominion over another country or territory considered "weaker" in some areas, with the purpose of acquiring more wealth and strength. It usually establishes its domination through direct territorial acquisition or by gaining political and economic control of other areas.

b) race riots in several cities