Answer:
Keeping its interest rates low
Step-by-step explanation:
Interest rates correlate with the exchange rate of a country. Low-interest rates are unattractive to foreign investors. Investors associate low-interest rates with reduced returns. In the foreign exchange market, the demand for such a country's currency will below, resulting in a lower exchange rate against other currencies.
If a country has low-interest rates, its currency will be in low demand, meaning its strength will be relatively weaker against the US dollar. One dollar will be able to buy a large quantity of goods and services from such a country. In other words, that country's exports will be cheaper in the USA.