Which heading best complete the partial outline below?

When was Velvet Empire created? Why did the civilization crash before the renaissance? What was Clovis weaknesses? Where did priests sleep in 1363? Did emperors pay for bloody fights in the Roman Colosseum to gain popularity? What are some obstacles that Henry purcell faced? Who the European explorer that inroduced culture to china in the 1200s? What Scottish clan are you? Why exploration accelerated in the 1400s and 1500s? Which achievement allowed Rome to maintain contact with its large empire? What was a major effect of the Renaissance on European culture? What is the difference between has started and has been started? What is the nationality of the surname Czubik? What caused the renewed debate over slavery in the west? Why did the north oppose to the idea of cheap western land? When did the modern era occur? What did Roman soldiers wear? Where did a medieval scribe live? How did the reconquest influence the crusades? What role did the transcontinental railroad affect the settlement of the west?