Which number represents the time period in which the Persian Wars- between Greek and Persian civilizations- came to an end? a.) 1
b.) 2
c.) 3
d.) 4

A

Explanation:

B. 2

Explanation:

a. poison gas was sprayed over battlefields by airplanes to weaken enemy positions before major attacks.

there are many answers to this question, such as a diplomat, ambassador, soldier, united nations employee, cia, etc.