Which of the following was a major cause of the Peloponnesian War?

A. Clashing religious and cultural values in Greece

B. Dissatisfaction with Athens's growing empire

C. Sparta's desire to spread democracy

D. The invasion of Greece by Persian forces

The correct answer for this question is "A. Clashing religious and cultural values in Greece."

A major cause of the Peloponnesian War is that of Clashing religious and cultural values in Greece. It created a big tension inside the nation of Greece.