I think in A, the graph on the top does not belong to A, B or C. Because it does not stop, go slow or start at the half way point. In A I think the correct ones were the ones on the bottom. I think that because they stop but not for a long amount of time and then the rest of the graph is slower. I don’t think a lot of the problems where they are positoned is correct. I think the other to in A are correct because the people just walked for different amount of times. Because the problem never said how long the people on the 20 meter track walked for