The simple spending multiplier understates the amount by which output changes

Which one of the following goods can be considered a global commons?

a. A National Park b. A river c. An ocean d. A herd of deer e. A diamond mine

If a country wants to keep a foreign currency undervalued against the domestic currency:

A) it will buy both the foreign and domestic currency. B) it will sell both the foreign and domestic currency. C) it will buy the domestic currency and sell the foreign currency. D) it will buy the foreign currency and sell the domestic currency.