Which counrty would improve in tracks and field/Olympics ?

Question

If all the athletes ran for the country that they were born in. For example, Sonia Richards of America running for Jamaica cause that's where she was born and so on!

Answer 1

Many of western countries would would have to sit out of the sprinting events.

Answer 2

Obviously Jamaica would ! lol a lot of our athletes are running for  different countries!

Answer 3

The U.S... I remembered Carl Lewis and oh man did he fly!

Answer 4

How about - what country would improve if the athletes that were trained and coached in that country had to run for that country. For example Mellouli, winner of 1500m swimming, trained in Texas, wins gold for Tunisia.  

Answer 5

idk