This is currency that is accepted for payment by any international seller.Group of answer choicesCrypto currencyHard currencyAll of theseSoft currency

Analysis of Options

1. Crypto currency: This type of currency operates independently of a central authority or government. While it can be accepted by some international sellers, it isn't universally accepted.

2. Hard currency: This refers to a currency that is widely accepted around the world for international transactions and maintains its value over time. It is typically stable and trusted.

3. Soft currency: This is a currency that is not widely accepted outside its own country and may be subject to inflation and other risks. As a result, it is not suitable for international transactions.

4. All of these: This option implies that the former three types of currency would collectively meet the criteria, which is not accurate given the nature of soft currency.

Conclusion

The most appropriate choice for currency that is accepted for payment by any international seller is Hard currency. This currency is generally trusted and widely accepted in international transactions.