How can you retrieve the status of an envelope sent by DocuSign?

Retrieving the status of an envelope sent by DocuSign can be effectively done using the REST API provided by DocuSign. The REST API allows developers to interact with DocuSign's services, including checking the status of envelopes. By making an API request to the relevant endpoint, you can obtain real-time information about the envelope's status, such as whether it has been sent, viewed, signed, or completed. This method provides flexibility and direct access to the latest status updates, making it a reliable choice for integrating DocuSign functionality within applications.

The other options involve specific Apex classes that may be designed for different functionalities related to envelope management but do not directly reference the ability to retrieve status through general API calls. These classes could potentially have roles in the overall management processes but do not align with the direct method of accessing envelope status, emphasizing why the REST API is the more accurate choice for this task.