When using an economic model, it tends to: a) start with a lot of details and then

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Question:

When using an economic model, it tends to:
a) start with a lot of details and then get simpler over time.
b) include many caveats to ensure that the model is realistic.
c) start with very few details to simplify the model.
d) use a case study approach focusing on a specific real-life example.