By presenting the early start of Robinson's career in her track career, the author is trying to set the ground for s strong and determined will possessed by the athlete in the first sentences. The author accomplishes this by presenting the short time it took Robinson to win her first gold medal, only four months.
The next inspirational statement is presented when the author mentions that in the 1928 Olympics it was the first time women were allowed to compete, and Robinson became the first woman to win a gold medal, again she is giving sign of a tremendous willpower.
With this introduction it is easy to notice that in order to emphasize and close the idea the only correct option is the last one: Robinson’s story illustrates that an ambitious mindset can overcome physical challenges.
the first one mentions that very few people have the capability to rehabilitate themselves. We do not have any evidence that suggest that in the paragraph.
the same happens with the two other options, we have no evidence present that the doctors can never predict who will prevail over debilitating injuries, or that Robinson’s story illustrates that the chance to compete in the Olympics motivated her to walk and run again.