Why Might Government's Defining, Recognizing, and Protecting Property of Every

Why might government's defining, recognizing, and protecting property of every sort, from real estate and land to intellectual property, be so essential to the functioning of a market economy?

A) Because without such government action, democracy would cease to function
B) Because governments rely on property taxes to function, and then properly regulate the marketplace
C) Because property ownership claims are meaningless without legal recognition and enforcement
D) Because without government, societies would have no means of adopting standard weights and measures