[A] Yes it is possible to approve multiple documents at a time.
[B] To do so, go to the "Approval module" (1) and to the "Received" tab. Search for the documents for which approval is to be given and click on the "checkboxes" next to them (3).
[C] Click on "Approve" or "Approve and Send" (4) as required. The selected documents will get approved.
Keywords: Approve Multiple Documents, Multiple Documents, Approve