Which most accurately describes the history of the Byzantine and Arab Empires?

Question

the byzantine followed moral behaviors described in Torah, whereas the tao te ching dictated behavior in the Arab empire

the Byzantine empire adopted Christianity, whereas the Arab empire adopted Islam

the Byzantine empire adopted Islam, whereas the Arab empire adopted Christianity

the Byzantine empire followed sharia law, whereas the Arab empire government was based on Greco-roman laws
I think its b

Answer 1

Yes, b.

Answer 2

thank you

Answer 3

okuuuur

Answer 4

thx