How was the Persian Empire able to survive until 331 B.C.E. ...

[kfurse]

How was the Persian Empire able to survive until 331 B.C.E. despite frequent royal assassinations occurring the last one hundred years?
 
  a. The strength of the Achaemenid throne.
  b. Its administrative structure.
  c. The strength of its large professional army.
  d. Weaker neighbors.
  e. Zoroastrianism.

Question 2

Augustus increased the number of Roman citizens by awarding citizenship to
 
  a. conquered peoples.
  b. all Greeks.
  c. discharged soldiers.
  d. non-Roman local officials.
  e. merchants and tradesmen.

[DHRUVSHAH]

Answer to Question 1

b

Answer to Question 2

c