Ernest Invents a Novel,useful,nonobvious Product.He

Ernest invents a novel,useful,nonobvious product.He:

A) must apply for a patent within one year of selling the product commercially.
B) is entitled to a patent over someone else who invents the same product if he is the first to file an application.
C) may receive patent protection for two years by filing a simpler, shorter, cheaper provisional patent application while he is working on his complex, regular patent application.
D) may sell his product for up to five years to see how well it sells before going through the complex process of filing a patent application with the PTO Office.