Final answer:
To increase the value of its currency, the central bank of Country K can raise interest rates to attract foreign investment, thereby increasing demand for its currency. Directly intervening in foreign exchange markets is another option, but measures like increasing the money supply, income tax, or tariffs are not effective for this purpose.
Step-by-step explanation:
When the central bank of Country K wishes to increase the value of its currency on foreign exchange markets, there are several measures it could consider. However, based on the material provided and standard economic practices, one of the most direct approaches would be to intervene in the foreign exchange markets directly.
If the central bank opts to raise interest rates in Country K, this could attract foreign capital, as investors seek higher returns on investments in Country K's currency, therefore increasing demand for it and thus its value. This practice, while effective, can have wide-ranging impacts on the economy and must be used carefully to avoid undesirable side effects like slowing economic growth.
On the other side, increasing the money supply would likely have the opposite effect by devaluing the currency, as it increases the amount of currency in circulation, potentially leading to inflation. Similarly, options like increasing income tax, increasing tariffs, or buying other countries' currencies do not directly lead to an increase in the value of Country K's currency and sometimes can be counterproductive to the stated goal.