The best answer to go with is b
The capital of Greece is Athens
For continental U.S. the answer is never. Since the earth's rotation axis is tilted 23.5 degrees with respect to its orbital motion around the su, one would have to be less than 23.5 degrees above or below the equator to have the sun pass direclty overhead
well luckily for you I live in Alaska and it is the Yukon River
