A rare genetic disorder affects $1$ out of every $500$ individuals. A screening test for the disorder returns a positive result $90\%$ of the time when a person actually has the disorder, and $4\%$ of the time when a person does not have the disorder. If a person tests negative, what is the probability that they do not have the disorder? Use Bayes' Theorem.

• A. $0.0002$
• B. $0.9998$
• C. $0.9583$
• D. $0.0417$

Answer: (B)