Answer:
b. It promoted Islam but tolerated the culture, religion, and science of non-Muslims.
Over a time of a couple of hundred years, Islam spread from its place of starting point in the Arabian Peninsula the whole distance to present day Spain in the west and northern India in the east.
Islam went through these areas from numerous points of view. Now and then it was conveyed in extraordinary trains or ocean vessels crossing immense exchange organizes ashore and ocean, and different occasions it was exchanged through military victory and crafted by ministers. As Islamic ideas and societies came into contact with new cultures, they were expressed in various ways and taking different forms.