What challenges did the byzantine empire face from foreign forces?
slavs and avars–
avars and sassanids–
arabs–
bulgars–

hello there the answer is a

sorry if i am wrong hope that : )

i think option 3. would be ur best bet and u need to write it urself

have a good day

a

explanation:

a reason that was key to coolidge's victory in the 1924 presidental election was that; democratic party supporters were split in the north and south.