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").

Blind people are unable to see what the shapes of things are, but they can still sense it thanks contacting it via their (A) flying (B) singing (C) smiling (D) hands
D

A container with a printed scale on it's side is used to (A) measure weight (B) hold flowers (C) hear through doors (D) measure volume
D

When you scream in an empty room, you hear an echo due to the noise (A) eating (B) bouncing a ball (C) nothing (D) bouncing off stuff

D