How does the story of Mephibosheth, son of Jonathan and grandson of Saul, illustrate David's understanding of covenant theology?

A It demonstrates David's strict adherence to the Mosaic Law, punishing the descendants of his enemies. B It reveals David's political strategy to consolidate power by eliminating potential rivals to his throne. C It exemplifies David's commitment to honoring his covenant with Jonathan, extending grace and protection to Jonathan's heir despite Saul's hostility. D It shows David's favoritism towards the tribe of Benjamin, Saul's tribe, in order to maintain peace within the kingdom.