Concept:Currency depreciation makes a country's goods cheaper for foreign buyers. This boosts export demand.
Explanation:When a currency depreciates, its exchange value falls against other currencies.
As a result, foreign buyers need to spend less of their own currency to buy the same amount of domestic goods.
This makes exported goods more competitive in international markets, so foreign demand for them rises.
Consequently, the volume and value of exports tend to increase.
The other measures do not encourage exports.
Higher export duties make exported goods more expensive and reduce exports.
Higher excise duties raise domestic production costs without directly helping exports.
A total ban on imports restricts foreign goods but does not increase the sale of domestic goods abroad.
Answer:The correct option is C: Depreciation of currency.