Which of the Following Is True with Regard to Obtaining

Which of the following is true with regard to obtaining a patent?

A) To obtain a patent,besides satisfying the provisions of the Patent Act,the inventor must show that the invention was not known or used by any other person before he or she invented it.
B) The inventor's expression of the idea is automatically protected under the provincial Patent Act.
C) If a patent application is denied,the inventor can apply for trademark protection instead.
D) The Patent Act allows a patent to someone for an existing process or machine that is in use but has not been patented.
E) The inventor does not have to send specifications or a model when he sends his application.