What record-breaking split did Felix run in the 4x400m at the 2015 World Championships?
47.72 seconds
48.00 seconds
49.50 seconds
46.80 seconds
Answer
The answer is 47.72 seconds, an incredible split that shattered the previous record. This exceptional performance showcased Felix's unparalleled talent and cemented her status as one of the greatest 400-meter runners of all time.