The three main sources of barriers to entry are monopoly resources, government regulation, and the firm's production process

A trademark is

A) a legal instrument which grants a firm the right to differentiate its product. B) a legal right to position a firm's product in high-traffic public areas such as airports and post offices. C) a distinguishing attribute such as a sign or logo that allows a firm to uniquely identify its product. D) a patent on a firm's product.

The longest contraction in American history occurred

A) during the 1870s. B) in the years right before World War I began. C) during the 1930s. D) during the 1970s.