Data Sufficiency

If Runner \(A\) followed Runner \(B\) down a portion of track that is \(1/3\) mile long, how many seconds did it take Runner \(A\) to run the track?

1) Runner \(A\) ran onto the track \(10\) seconds after Runner \(B\) ran onto the track and ran off the track \(8\) seconds after Runner \(B\) ran off the track

2) Runner \(B\) ran the track at a constant speed of \(9\) miles per hour

The OA is C