Question

who conquered persia and help trade extend further than ever before?
cyrus the great
alexander the great
darius i

Explanation:

To solve this, we analyze each option:

• Cyrus the Great founded the Achaemenid Empire (Persian Empire) but the question is about conquering Persia (implying from an external force, and he was Persian).
• Alexander the Great, from Macedonia, conquered the Persian Empire (under Darius III) and his conquests led to increased trade and cultural exchange across a vast area, extending trade further than before.
• Darius I was a Persian king who administered the empire but did not "conquer Persia" in the sense of an external conquest.

Answer:

B. Alexander the Great