How and where did muslims build an empire

From what I know:

Explanation:

The moors (ancient muslims) built their empire in northern Africa, Southern Europe and around the meditaranian by spreading their religion. People like Alexander the Great did the same thing with religion, so the moors did the same. They built mosques, minorets and if you know what the blue mosque is, it used to be a catholic cathedral in constantinople (modern day istanbul turkey) but the moors invaded and covered all the catholic art and turned it into a mosque

answer; ///i believe its (b); ///the president will sign it or veto the check first good luck

demand is the need and oportunity to buy a given good or service.