Answer:
D. it explains that Earthship must use regular batteries for power on cloudy days.
“[A]sk not what your country can do for you—ask what you can do for your country.”
Answer: Rainsford believed this because Zaroff stopped and his eyes climbed up the trunk of the tree. But his eyes stopped before he reached the limb where Rainsford lay and he smiled. Then he blew a smoke ring towards the tree and walked in the opposite direction. It’s obvious that Zaroff knew he was there, but was trying to prolong the game.