Final answer:
The Big Mac Sandwich would be classified as a differentiated product produced by a monopolistic competitor.
Step-by-step explanation:
In monopolistic competition, differentiated products are characterized by their variety and distinctive features. Out of the given options, the Big Mac Sandwich would be classified as a differentiated product produced by a monopolistic competitor. The Big Mac Sandwich is sold exclusively by McDonald's and has unique ingredients and preparation methods that differentiate it from other burgers in the market.