What is one way that the growth of islam and christianity were similar during the postclassical era?
a. both declined in popularity because of government persecution.

b. both played a central role in establishing powerful civilizations.

c. both took on philosophies promoting peace and refused to commit violence.

d. both religions produced golden ages in the regions they dominated.

D. Both religions produced Golden Ages in the regions they dominated.

Explanation:

Christianity had turned into the State church of the Roman Empire in 380 and kept spreading into northern and eastern Europe during the post-traditional period to the detriment of conviction frameworks that Christians marked agnostic. An endeavor was even made to bring about upon the Middle East during the Crusades. The split of the Catholic Church in Western Europe and the Orthodox Church in Eastern Europe supported religious and cultural variety in Eurasia.  

Islam started between of 610 and 632, with a progression of disclosures to Muhammad. It bound together the warring Bedouin factions of the Arabian landmass and, through a fast arrangement of Muslim victories, ended up set up toward the west crosswise over North Africa, the Iberian Peninsula, and parts of West Africa, and toward the east crosswise over Persia, Central Asia, India, and Indonesia.

county governments

the answer to your question is a. the salt plains

in 1811, he led an expedition, known as the george c. sibley expedition, to improve relations with the pawnee and kansa tribes, and also to locate the rumored jefferson's salt mountain