You are given a sentence, a question and two answer options ('A' and 'B'). Your task is to find the correct answer (return the string of the correct option, not 'A' or 'B') for the given question.

Sentence: A glider moves at a lower rate of speed through the treetops then through the air. Question: Which surface is smoother? (A) treetops (B) air
air

Sentence: Mike's metal bar is much thicker then his paper sheet. Question: Which item would resist for longer if he tried to break it? (A) metal bar (B) paper sheet
metal bar

Sentence: Ellie exercises on her treadmill each day. One day she sets the treadmill up to be flat and runs on it for a set amount of time. The next day she sets the treadmill to incline so that she is running uphill which causes more exertion in the same amount of time. Question: Which treadmill setup will cause Ellie to drip more perspiration onto the treadmill? (A) the flat treadmill (B) the inclined treadmill

the inclined treadmill