Which statement is true regarding an approval process?

The statement regarding approval actions defining the result of record approval or rejection is accurate because approval actions clearly determine what happens when a record is approved or rejected within the approval process. These actions can include updating fields, sending email notifications, or even locking the record once approved. By specifying the outcomes related to approval and rejection, approval actions ensure there is clarity in the process and that all stakeholders understand what the next steps will be after a decision is made.

The other statements may not align with how the approval process functions. For instance, while delegated approvers do play a role in approvals, they typically approve or reject requests rather than reassigning them, which is not their primary function. Similarly, assignment rules primarily relate to routing records rather than defining approvers for process steps; that's typically managed within the approval process settings. Lastly, while it is true that the approval history related list helps track the approval process, it does not explicitly define the core function of an approval action, which is focused on the outcomes of the approval process itself. Hence, option B accurately encapsulates a crucial element of the approval process.