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:
Northern countries have extensive erosion due to (A) glacial liquification (B) cola mining (C) more frequent tornadoes (D) meteors
answer:
A


question:
Which two forces are likely the cause of canyons? (A) water plus fire (B) fire and brimstone (C) water plus gravity (D) H20 and lemmings
answer:
C


question:
If a bird is moving through the sky, someone wanting to know the speed would (A) speedily enjoy viewing (B) observe quickness (C) watch slowly (D) look away
answer:

B