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").

Ex Input:
What is a source of oxygen through photosynthesis? (A) lakes (B) car engines (C) sunflowers (D) people

Ex Output:
C


Ex Input:
when the needle of a compass lines up with Earth 's magnetic poles , the needle is (A) pointing east (B) pointing west (C) pointing at arctic (D) pointing to space

Ex Output:
C


Ex Input:
a learned characteristic is a (A) a baby having the same color eyes as parent (B) toddler banging with a stick while parent hammers (C) a child covered with freckles (D) infant diagnosed with sickle cell anemia

Ex Output:

B