Which of the following contributed to the mass conversion of people living in the Middle East to Islam by the eighth century?

option a

Explanation:

The mass conversion of people to Islam by the eighth century offered them many financial and social benefits.  

As the people start following Islam, they start supporting the cause of Quran economically and socially.  

People start spreading the knowledge of Quran and increasing the conversion of people.

when people started to question traditional christian beliefs, they became criminals in the eyes of the church: they were accused of heresy and then, executed. the church held unbelievable power and anyone who tried to defy it or its beliefs, was demonized and persecuted.

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