Economic models are built with a. recommendations concerning public policies. b. facts about the legal system. c. assumptions. d. statistical forecasts.

The correct answer is letter "C": assumptions.

Explanation:

Economic models are real-world assumptions economists make to simplify complex phenomena. Economists aim to predict or help to assess actual economic problems with the help of models which in some cases can be purely theoretical and in others can include mathematical calculations or graphs with lines and curves.

The laws of supply and demand are examples of economic models.

answer; closing the loop;