You are given a sentence, a question and two answer options. Your task is to write down the index ('A' or 'B') of the **incorrect** option for the given question.

[Q]: Sentence: Sara likes to throw her sponge ball around. After a while, she notices that rolls more quickly on her on her driveway so she had to chase it, then when she's playing on the grass. Question: Which surface has the greatest resistance? (A) concrete driveway (B) grass?
[A]: A

[Q]: Sentence: Bernie is pitching marbles. He notices that when he pitches the marbles on the tile in his kitchen, the marble goes faster and farther away than when he does the same action on grass. Question: Which surface is applying less friction to the marble? (A) grass (B) tile?
[A]: A

[Q]: Sentence: Two cars are going to race each other. One driver puts just enough fuel into his car's tank to get through the race in order to keep the weight of his car low. The other driver fills his car's tank completely, which makes the car more heavy. Question: Which car will get up to full speed more quickly at the start of the race? (A) car with full fuel tank (B) car with nearly empty fuel tank
[A]:
A