Which event happened first A the Persian Wars B Alexandria becoming the center of education C the Peloponnesian War began or D Alexander invading Persia?

Answer 1

C. The Persian Wars began 499 BCE.

Then:

The Peloponnesian War 431-404 BCE

Alexander invaded Persian Empire 334-324 BCE.

Alexandria became the centre of education 3rd Century BCE.

Answer 2

Persian War 490-449 BCE.

Peloponnesian War 431-404 BCE.

Alexaander invaded Persia 334-326 BCE.

Alexandria centre of education 2nd Century BCE.