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:
A tree must depend upon, for its support (A) A large fibrous mass (B) plants on the forest floor (C) the wooden welfare state (D) massive redwoods on the backs of turtles
answer:
A


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


question:
Which converts carbon dioxide, water, and solar energy into oxygen? (A) chrysanthemum (B) mistletoe (C) mushroom (D) mole
answer:

A