The optimal level of military expenditures is the level at which _____
The optimal level of military expenditures is the level at which _____.
a. a country is completely protected from foreign invasion
b. a country spends more on national defense than all other countries along it to win an arms race
c. a country spends more on national than its rivals
d. the marginal benefit of additional expenditures equals marginal cost
ANSWER
d
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