Umayyad Caliphs managed to expand their empire because the Byzantine and Persian empires were weak.
I believe you have to answer this question under your own opinion. How I see it I believe it would be your third option, but if it was to be answered as though one is super religious it would be the second option. I'm sorry I'm not much help, but at least it is narrowed to two options and you can decide which one.
Answer:
to encourage audience interest and participation.
Explanation: