Which of the following is a duty of the bank to the customer?

The duty of a bank to its customer includes providing cash withdrawal statements. This is an essential service that banks offer in order to maintain transparency and keep customers informed about their account activities. These statements help customers manage their finances, enabling them to track their cash withdrawals, deposits, and overall account balance. Such disclosure is part of the fiduciary responsibilities of a bank to act in the best interest of its customers, ensuring that they have all necessary information to make informed financial decisions.

In contrast, engaging in speculative investments does not align with the primary responsibilities of a bank, which typically involve safeguarding deposits and providing financial services rather than taking unnecessary risks with customers' funds. Rejecting payment orders might occur under certain circumstances, but it’s not a general duty; instead, it’s more of a risk management function that banks exercise when necessary. Lastly, a bank does not have the unilateral right to reduce service fees at will, as those fees are often governed by terms of agreements with customers and require proper notice or justification under regulatory frameworks.