How can an ATM/Debit card be processed at point-of-sale?

The option regarding processing an ATM/Debit card at point-of-sale through signature-based and PIN-based methods is correct because debit cards are typically designed to facilitate transactions in two primary ways.

When a debit card is used, the cardholder can either input a Personal Identification Number (PIN) to authorize the transaction or provide a signature for verification. PIN-based transactions are commonly utilized in scenarios where security and immediacy are essential, such as withdrawing cash or making purchases directly from a bank account. Signature-based transactions are often viewed as a convenience feature and may be required in some contexts, depending on the merchant's policy and the transaction amount.

The other options do not accurately represent the processing capabilities of debit cards at point-of-sale. For instance, cash-only transactions eliminate the use of debit cards altogether, while mobile payment applications represent a different processing method and do not encompass the traditional capabilities of debit card usage at point-of-sale. Additionally, credit card processing pertains to credit cards and does not encompass the full utilization of debit cards as described in the correct response.