instruction:
You are given a sentence, a question and two answer options ('A' and 'B'). Your task is to find the **incorrect** answer (return the string of the incorrect option, not A/B).
question:
Sentence: To save money, the contractor stopped buying the costlier wall supports he was required to use and started using some cheaper ones instead. As a result, several roofs collapsed. Question: Which wall supports were thinner? (A) The expensive wall supports were thinner (B) The cheaper wall supports were thinner
answer:
The expensive wall supports were thinner

question:
Sentence: A pair of glasses experiences low resistance when slid across a counter, but high resistance when slid across an office desk. Question: Which surface will cause the glasses to get hotter as they travel across it? (A) counter (B) desk
answer:
counter

question:
Sentence: Mary's kitchen floor is slicker then her hallway floor. She was feeding her dogs one day and some kibble slid across both surfaces. Question: Which surface caused the kibble to heat up less? (A) kitchen floor (B) hallway floor
answer:
hallway floor