Which of the following transactions likely involves a Debit Block?

A Debit Block is a feature used by financial institutions to prevent the processing of debit transactions against a specific account or to limit the types of transactions that can be processed. It is commonly employed to protect accounts from unauthorized access and to ensure funds are not withdrawn without explicit authorization.

Automated withdrawals for subscriptions typically involve recurring debit transactions where businesses regularly take payments from a customer's bank account for ongoing services or products. Due to the nature of these transactions, a Debit Block may be employed to control or restrict unauthorized withdrawals, which helps safeguard the customer's funds while allowing for the legitimate automated transactions to occur.

In contrast, direct deposits from employers usually represent incoming funds rather than outgoing, and thus are typically not subject to Debit Block restrictions. International wire transfers are typically one-time transactions that are distinguished by their own processing rules and do not usually involve the same risks as automated withdrawals. Customer payments to suppliers may also be arranged in a way that does not necessitate a Debit Block, as these may be authorized transactions determined by both parties.

Thus, the nature of automated withdrawals for subscriptions aligns most closely with the need for a Debit Block, making this the correct answer.