Which of the following about the expansion of islam is not true?

The
expansion of the Arab Empire in the years following Muhammad's death led to the creation of caliphates, occupying a vast geographical area and conversion to Islam was boosted by missionary activities particularly those of Sufis, who easily intermingled with local populace to propagate the religious teachings.

Uneed to count step by step taking information out to resolve in your answer

Awould be the correct answer