Which development eventually led to the Peloponnesian War?

A creation of the Peloponnesian League and the Delian League
B rivalry between Athens and Sparta for power in Greece
C Athens’ jealousy over Persian support of Sparta
D Persian attacks on Greek colonies in Ionia

B. The Peloponnesian War was a war fought in ancient Greece between Athens and Sparta—the two most powerful city-states in ancient Greece at the time (431 to 405 B.C.E.).