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").

Input: Consider Input: which of these conditions might lead to the inability to move one's bones? (A) the absence of blood platelets (B) an absence of vitamin C (C) muscular wasting might be present (D) a shortage of white blood cells

Output: C


Input: Consider Input: Amphibians undergo changes in structure of being in that (A) salamanders can regrow their tails (B) salamanders can lose their tails (C) frogs can breathe air and water (D) they begin as a different looking being

Output: D


Input: Consider Input: How do bats avoid crashing into trees while flying around at night? (A) they wander around aimlessly lost (B) they bounce their screams off of things (C) they ask someone where to go (D) they see with their eyes


Output: B