instruction:
In this task, you are given a multiple-choice question and you have to pick the correct option. Answer with option indexes (i.e., "A", "B", "C", and "D").
question:
What does gravity cause substances on a planet? (A) things to move sideways (B) things to be moved upwards (C) things to descend to the lowest surface possible (D) things to stay in the same place
answer:
C


question:
The last celestial body in our solar system without an orbit is (A) Saturn (B) Jupiter (C) a meteor (D) Uranus
answer:
C


question:
How can H2O on the ground eventually rise into the sky? (A) freezing (B) raining (C) snowing (D) evaporation
answer:

D