Final answer:
In the context of dispatching within an operating system, a 'task' and a 'process' are often used interchangeably as terms referring to the execution entities that the system manages.
Step-by-step explanation:
The unit of dispatching, which refers to the execution entity managed by the operating system, is typically known as both a process and a task. In computing, a job can be a batch of processes, whereas a thread is a subset of a process that can be executed independently. It can be confusing as the terminology often overlaps, but in the context of operating system concepts, the answer to the question is most accurately 'D) Process' or 'C) Task', depending on the level of granularity being considered.