Because, when an infection exist in the human body it tends to spread, so if the cells stayed in one space then the infection would have a much greater opportunity to severly make that person very ill before the cells could even get to the infection.
Answer:
Black
Explanation:
In my opinion black is better because it goes with every color of clothes you have.If you spill something on it you can't really tell either.But every one has there opinions.:)