Answer: Option(c) is correct
Explanation:
Economic model is the concept that depict the real economic behavior and processes through hypothetical construction.It helps in understanding the complex concept of economic procedures with ease,simplicity and logically.It helps in testing theories and representing relationships.
Other options are incorrect because economic model not increase complexity in understanding concept, can be proven incorrect,does not includes critical elements and equation usage is not done in normative concept. Thus, the correct option is option(c).
Answer:
Leningrad, now known as Saint Petersburg
Answer:
serfs: workers who was tied to the land which they lived
