According the map key on the Spread of Islam Reading, what do the 1,2 and 3 represent?
Answer: 1 stands for Arabia
2 stands for Egypit, Persia, and Syria
3 stands for Spain and Berbers
or
1 stands for At the death of Muhammad, 632
2 stands for After the conquest of the first four caliphs, 661
3 stands for After the conquest of the Umayyad caliphs, 750