Which of the following actions can a central bank take to appreciate its currency? Select all that apply.

A central bank can appreciate its currency by increasing interest rates or buying its own currency in the foreign exchange market. When a central bank raises interest rates, it makes saving money in that currency more attractive, which can lead more people to invest in it. For example, if the central bank of a country raises interest rates, investors from other countries might want to buy that currency to take advantage of the higher returns. Additionally, when a central bank buys its own currency, it reduces the supply of that currency in the market, which can also lead to an increase in its value. These actions help strengthen the currency and can make imports cheaper and exports more expensive.