Which of the following allows simultaneous access to data by multiple users?

The correct answer is multi-user access, as it specifically refers to the capability of a system or application to allow multiple users to access data at the same time without conflicts. This is essential in environments such as databases and networked applications, where collaborative work is common. Multi-user access is designed to handle simultaneous requests efficiently, ensuring that all users can retrieve and manipulate data concurrently without interference.

In contrast, database access is a broader term that refers to the ability to retrieve or interact with data within a database, but it doesn’t necessarily imply that multiple users can do so at the same time. Shared access might suggest that resources are accessible to several users, but it lacks the emphasis on the simultaneous aspect that multi-user access provides. Dedicated access indicates that resources are reserved for a single user, which inherently contradicts the concept of simultaneous access. Therefore, multi-user access is the most appropriate choice in this context.