How Did the Hellenistic Empires Affect the Nature of Warfare

How did the Hellenistic empires affect the nature of warfare?

A) Warfare became based on mass conscription as Hellenistic kings drafted large numbers of troops into military service.
B) Warfare became rare since the Hellenized kings worked cooperatively to avoid conflict.
C) Warfare became more professional as soldiers became trained, full-time employees of the kings, who often gave them incentives to remain loyal.
D) Warfare became more savage, and improved technologies resulted in many more deaths.