Correct Answer: Tariffs and trade barriers

Solution : The correct answer is (c) Tariffs and trade barriers

Tariffs and trade barriers primarily affect a country's trade balance, which is a component of the current account balance. However, they are not factors that directly affect the overall current account balance. The current account balance is influenced by various factors such as exchange rates, income levels, and domestic savings rates. Exchange rates impact the competitiveness of exports and imports, income levels affect consumer spending on imports, and domestic savings rates influence the availability of funds for investment and borrowing from abroad.