What sparked the beginning of the thirty years’ war? a)pope leo iii needed protection from the franks and subsequently declared charlemagne king of the newly formed holy roman empire. b) holy roman emperor ferdinand ii issued a decree that everyone in bohemia must be catholic, and his officials began closing down protestant churches. c) muslim leader saladin led the arab empire against christian crusaders at the battle of hattin, paving the way for a muslim-controlled jerusalem. d) queen isabella and king ferdinand sought approval from the papacy to persecute protestants and muslims in spain.