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:
Which of the following actions can make electrical energy brighten your room? (A) Clap on! (B) Jumping in place (C) Turning a doorknob (D) Rubbing your nose

Ex Output:
A


Ex Input:
Though fossil fuels and their byproducts will eventually be used up completely, we'll still have (A) gasoline (B) coal (C) plastics (D) light from stars

Ex Output:
D


Ex Input:
Switches can be used to cease electronic energy flow, such as when (A) a button is pushed and a fan stops spinning (B) a fridge is running loudly (C) a freezer turns off in a power outage (D) a light is turned on

Ex Output:

A