which helped established a common islamic culutral foundation?

Mosques were built throughout dar al-Islam
Anti-Surfism unified peoples in the Islamic World
Civil and criminal law were contained in the Sharia
The pilgrimage to Medina attracted all believers

Question

which helped established a common islamic culutral foundation?

Mosques were built throughout dar al-Islam
Anti-Surfism unified peoples in the Islamic World
Civil and criminal law were contained in the Sharia
The pilgrimage to Medina attracted all believers

Allison · Answer

I would think the Quran did.

Allison · Answer

Using process of elimination, I would eliminate B and C.