Read the following passage carefully and answer the questions based on the passage:
People will invest in education if they are given the economic freedom to fully enjoy the benefits. As has become the norm, people invest in education because the marginal return on education increases their economic freedom. It is a sound decision to invest in education if, after tax rate reductions, people can enjoy a certain income marginally higher than the income they derive from improving educational levels. However, it makes no significant sense to invest in education if the government taxes the income of educated people at a very high rate. The same applies to parents who wish to improve their children's educational standards.
Which economic principle best explains the behavior described in the passage?
Show answer & explanation
Correct answer: C
Explanation
The passage describes how individuals decide whether to invest in education by weighing the potential increase in income (marginal benefit) against the costs, which are influenced by tax rates. This behavior directly illustrates the economic principle that people make rational decisions based on incentives, choosing to invest when the expected benefits outweigh the costs.