Australian media are reporting today that doubts have been raised about the ages of Chinese medal - winning athletes as long ago as the Sydney Olympic Games in 2000 . Age - falsification has become a burning issue since the Beijing Games last month , where it was alleged that Chinese gymnast He Kexin , who won two gold medals , was underage and therefore should have been ineligible to compete in the event . Rules introduced in 1997 to prevent the exploitation of under - aged gymnasts stipulate that competitors are required to be at least 16-years - old in the year the Olympics are held .

Based on the preceding passage, choose your answer for question Why would there be a rule in place to prevent am under sixteen old from competing ?
Select from: 1. To make sure they are mature enough to compete at a high level .; 2. None of the above choices .; 3. To make sure the person has finished high school first .; 4. To avoid the person from being abused .;
The answer is:
4.