Feudalism, also called feudal system or feudality, French féodalité, historiographic construct designating the social, economic, and political conditions in western Europe during the early Middle Ages, the long stretch of time between the 5th and 12th centuries.
The United States purchased the Louisiana Territory from France at a price of $15 million
(°∀°)b
I'd have to say D. Collaboration, Communication, and Creativity