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: Drinking cola daily removes layers from the surface of (A) enamel on molars (B) spoons (C) porcelain (D) the coffee pot

Output: A


Input: Consider Input: Factories often add something to the environment that is (A) helpful (B) productive (C) sanitizing (D) posionous

Output: D


Input: Consider Input: Which is most accurate? (A) dams can capture powerful gusts and harness their power (B) windmills can capture lightning bolts and harness their power (C) dams can capture lightning bolts and harness their power (D) windmills can capture powerful gusts and harness their power


Output: D