What Is Significant About Herodotus' Histories

What is significant about Herodotus' Histories?

A) Herodotus was the first Greek historian and his work tells of Xerxes' invasion of Greece.
B) He was the primary strategist for Darius, recounting stories of military battles as strategic lessons.
C) He was an Athenian statesman and general who saved Athens by predicting an attack.
D) He was the founder of the political system of demes that eventually became a democracy.