She chose to run first , which gave her the best ground conditions in the finals .
Walker had the fastest time in the qualifying round -- a 16.699 , and that gave her the opportunity to choose which runner she would be in the championship round .
Walker chose to run first , which gave Walker the best ground conditions in the finals .
Walker had the fastest time in the qualifying round -- a 16.699 , and that gave her the opportunity to choose which runner she would be in the championship round .