How did the various groups of Muslims expand the empire through the years? A) They used military tactics.
B) They made alliances and conquered by force.
C) They flooded new regions with large numbers of Muslims.
D) They made treaties with neighboring regions.

Military tactics

Explanation:

They managed to destroy the post persian empire and then theres the byzantiums who were much larger but got destroyed

How did the various groups of Muslims expand the empire through the years?

A) They used military tactics.

B) They made alliances and conquered by force.

C) They flooded new regions with large numbers of Muslims.

D) They made treaties with neighboring regions.

Explanation:

food and resources were plentiful.

women were encouraged to marry later in life so they could work in factories.

b: to eliminate competition from other farmers