What type of commands does a robot program use to perform operations?

The correct answer highlights the type of commands utilized in robot programming to execute tasks effectively. In robotics, a robot program is typically designed to follow a set of instructions that are executed in a specific order. This orderly execution is fundamental to ensure that the tasks performed by the robot are completed sequentially and correctly.

While the other options might suggest various ways commands can be structured, they do not capture the systematic and logical progression of tasks inherent in robot programming. For instance, sequential commands emphasize the importance of processing each command one after another, ensuring that operations are performed in a coherent and predictable manner. This is essential for maintaining safety and efficiency in automated environments, which is a core principle in Industry 4.0 settings.

By understanding that a robot program primarily relies on a sequential command structure, it becomes clear why this answer aligns with the underlying principles of robot operation and programming logic.