Better-Vision-Maker is a liquid that enhances the visual ability of a person with average eyesight by almost 500 times. The drug is intended for use by police, rescue, and medical service professionals. Research shows that a change in visual ability can alter the dynamics of the brain so that the new functionality can be adapted to. More testing into the side-effects of the drug should be performed before it is distributed for use.
The author's conclusion relies on which of the following assumptions?
A. The shift in the brain's dynamics caused by transition from one visual state to another may have an unfavorable effect.
B. Testing can result in the finding of additional uses for the drug which will then increase its market value.
C. To handle the extreme challenges presented to them, police, rescue, and medical services need the use of any practical tool available to them.
D. The brain adapts to increased visual ability in a similar way to an increased ability of another of the body's senses.
E. Enhancing the eyesight of the professionals mentioned will not actually result in an increase of their performance.