How does the narrative of Mephibosheth, Jonathan's son, in 2 Samuel 9, subvert typical ancient Near Eastern royal practices concerning succession and loyalty?

A It demonstrates David's strategic alliance with the remaining members of Saul's lineage to consolidate his power. B It reveals David's adherence to the Mosaic Law regarding the treatment of orphans and the disabled. C It exemplifies David's commitment to upholding a covenant made with Jonathan, extending grace and provision to a member of the deposed royal family, contrary to the common practice of eliminating potential rivals. D It showcases the political maneuvering of Ziba, Mephibosheth's servant, to gain favor with David and acquire land.