Which of these is the major cause for the fall of the Persian Empire?

Question

Responses
A conquest of Persia by Alexander of Macedonconquest of Persia by Alexander of Macedon
B conquest of Persia by the Athenian and Spartansconquest of Persia by the Athenian and Spartans
C the huge size of the empire became too difficult to managethe huge size of the empire became too difficult to manage
D conflicts between the upper and lower classes led to political turmoil

Answer 1

A conquest of Persia by Alexander of Macedon

Answer 2

A,e
A
B

%100