Answer: A) The passage contains a fact that must be supported by evidence.
Explanation: In the given excerpt from the essay "Gene Therapy or Genetic Enhancement" we can see the explanation of the meaning of the term "enhancement" which means the improvement of the normal bodily organization, function, health, and appearance. This information represents a fact, but, in order to be trust worthy, it should be supported by reliable evidence (examples, statistics, quotations, etc).