Which of the following is NOT an advantage of digital payment systems?

Longer waiting times is the correct answer because, unlike other digital payment advantages, it highlights a potential disadvantage associated with the use of digital payment systems. Typically, digital payment systems are designed to streamline transactions, thereby reducing waiting times for both customers and businesses. In contrast, the other options—lower costs, increased security, and convenience—are all clear benefits that digital payment systems provide.

Lower costs can arise from reduced transaction fees and lower operational expenses for businesses, while increased security is realized through encryption and fraud detection technologies that help protect users' financial information. Additionally, convenience is a hallmark of digital payments, as they allow consumers to complete transactions quickly and easily through their devices without needing to carry cash or visit a physical store.