Beyond his role as a judge, what significant action did Samuel undertake that fundamentally altered the political structure of Israel, as described in 1 Samuel?

A He established a permanent priestly lineage within his own family. B He advocated for a decentralized government based on tribal autonomy. C He anointed Saul as the first king of Israel, transitioning the nation from a theocracy to a monarchy. D He initiated a series of military campaigns to expand Israel's territory.