Conditional routing can be used to direct a purchase order based on which of the following?

Conditional routing is a powerful feature in DocuSign that allows for the dynamic directing of documents through different workflows based on specific criteria. In this case, the total amount of the order is a crucial factor as it can be used to determine various approval processes or workflows. For instance, if an order exceeds a certain threshold, it may require additional approvals or be sent to a different department for review. This enables organizations to streamline their operations by ensuring that the right people are involved based on the significance or value of the order.

The other choices, while potentially relevant in various contexts, do not provide the same level of precise decision-making that conditional routing requires. The recipient's email address, for example, could potentially be used to identify who receives the document, but it does not inherently dictate a routing path based on order specifics. Similarly, the time of day the order is placed or the sender's department could influence workflows, but they do not directly relate to the monetary value that often determines the need for varied levels of scrutiny and approval. Thus, using the total amount of the order makes logical sense for establishing a workflow that responds appropriately to different financial thresholds.