Scientists utilize models for a variety of different purposes, but each type of scientific model has limitations. What might be a limitation of existing solar system models?
а. They are not based on experimentation
b They are used for prediction.
C. They cannot be changed.
d They are based on current knowledge
Please select the best answer from the choices provided
A
D
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C. Keynesian Phillips curve tradeoff.

Explanation:

In the border of the Phillips curve of Keynesian macroeconomics, there is an explanation that links unemployment and inflation through a tradeoff. In times of high inflation, the economy is hot and companies are labor-intensive, so unemployment is low. However, when recessionary inflationary policies are adopted, consumption and economic activity decline, causing firms to lay off employees to adjust to the new reality of the consumer market.