FERMAT 2012 Problem 20

Katie and Sarah run at different but constant speeds. They ran two races on a track that measured 100\:m from start to finish. In the first race, when Katie crossed the finish line, Sarah was 5\:m behind. In the second race, Katie started 5\:m behind the original start line and they ran at the same speeds as in the first race. What was the outcome of the second race?

Answer Choices
A. Katie and Sarah crossed the finish line at the same time.
B. When Katie crossed the finish line, Sarah was 0.25\:m behind.
C. When Katie crossed the finish line, Sarah was 0.26\:m behind.
D. When Sarah crossed the finish line, Katie was 0.25\:m behind.
E. When Sarah crossed the finish line, Katie was 0.26\:m behind.