If the exchange rate is expressed as VND/USD (23000 VND = 1 USD), the VND is said to depreciate against the USD if the exchange rate
1) falls. Other things the same, it will cost more USD to buy Vietnamese goods.
2) rises. Other things the same, it will cost fewer USD to buy Vietnamese goods.
3) falls. Other things the same, it will cost fewer USD to buy Vietnamese goods.
4) rises. Other things the same, it will cost more USD to buy Vietnamese goods.
Which one is correct