Answer:
Preferential
Step-by-step explanation:
As the circumstances of Suleiman being a Muslim prophet, he obviously did have a slight preference for Muslims over non-muslims. But this is perspective. Suleiman had this preference since he claimed prophethood and was told to tell people about the religion of Islam, therefore, those who followed it would be no doubt be of preference. He did not express cruelty against non-muslims, he didn't have to be obedient as he was a king and he was definitely respectful when needed. However, for this question, "Preferential". Hopefully you find this answer helpful :)