-team player.
-flexible.
-good communicator.
-passionate.
-and way more.
The answer would be: III. Many genes may be responsible for obesity so it is currently not possible to determine whether Doug is destined for obesity.
Answer I is a stretch, he might not become obese just because of his genetic mutation. Answer IV is completely irrational, and Answer II is too unsure to be able to say for certain.
Because if something happens to the person that is working ..