Why did Wilma Rudolph compete in the Olympics relay races?

Did she want to prove everyone wrong from her past? Did she have a passion for racing? Please give me a clear answer, it doesn't have to be long, but thorough and clear.|||Of course she was passionate about running. Greatness requires it. She ran the relays because she was part of a TEAM (a frequently forgotten concept). Bolt runs relays for Jamaica, Phelps swims them for USA.