The primary causes were that Sparta feared of the growing power and influence of the Athenian Empire. The Peloponnesian war began after the Persian Wars ended in 449 BCE. This disagreement led to friction and eventually outright war. Additionally, Athens and its ambitions caused increasing instability in Greece.
President Wilso urged to the American people to go into World War I, declaring war to Germany and make the world safe for democracy. On 1917 US Congress declared war to Germany.
The answer is A) condition are much harsher on Mars than earth.
<span>Wartime Diplomacy - AP U.S. History Topic Outlines - Study Notes/ i dont wanna copy and paste so just google that </span>