I think it is b because there are key word s like ought
Answer:
Christian leaders of the Byzantine Empire feel worried about the Muslim Ottomans which taking over territory so close to the Byzantine Empire.
Explanation:
Christian leaders of the Byzantine Empire feel worried about the Muslim Ottomans who are taking control of the areas which are close to the Byzantine Empire because they know that Muslims did not stop and after these areas, the Muslim Ottomans also attack on the Byzantine Empire in order to conquer it and expand their empire so the leaders of Byzantine Empire start struggling to stop the Muslim Ottomans to enter in their lands.
Some of the themes presented in the story of Rapunzel is true love and courage. The fairy tale discusses how true love conquers all struggles and odds for the love of each other and for believing that true love can win in whatever struggle it may face. The courage to believe that two people can actually be together despite the challenges that they are facing. The challenge of fighting for something they thought is right but opposed and contradicted by a lot of people around.
True monks and nuns in Christian Europe spend their time praying and studying