William comes up with a completely unique way to kill mosquitos the moment they touch human skin without applying anything. The product works perfectly, but William does not do anything involving the public with it. Two months later, Vickie separately comes up with the same method. Vickie immediate files for patent protection, a step William never took. After being granted patent protection, Vickie sues William for patent infringement. William provides the court absolute proof he thought up the method independently before Vickie. What result?

A. William has infringed Vickie's patent.

B. Vickie will be permitted to enforce her patent against anyone but William.

C. William will be granted a joint patent.

D. Vickie's patent will be reversed.

E. William will be allowed to continue his sales.