How does the obscure story of Mephibosheth (2 Samuel 9), Jonathan's disabled son, contribute to our understanding of David's character and the nature of God's covenant?

A It demonstrates David's strategic political maneuver to secure his kingdom by eliminating potential rivals. B It shows David's meticulous adherence to the Mosaic Law regarding the care of the disabled. C It highlights David's commitment to extending grace and kindness, even to the descendants of his enemies, reflecting God's own covenantal faithfulness. D It illustrates the tragic consequences of war and the importance of physical strength in leadership.