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 Q]: The usual kind of weather in a location is called what? (A) warmth (B) fog (C) zone conditions (D) visibility
[EX A]: C

[EX Q]: What is undesirable in a vegetable garden? (A) tomatoes (B) green peppers (C) corn (D) dandelions
[EX A]: D

[EX Q]: Smoothing will occur (A) if two pebbles rub together over long periods of time (B) if an abrasive is rubbed against cement (C) if flint is struck against stone (D) if bricks are thrown at each other
[EX A]:
A