Which of the Following Is True Regarding What May Be

Which of the following is true regarding what may be the subject of a patent?

A) Only products may be the subject of patents.
B) Only processes may be the subject of patents.
C) Only inventions may be the subject of patents.
D) An invention may be the subject of a patent, but a plant produced by asexual reproduction may not be the subject of a patent.
E) A product, a process, an invention, or a plant produced by asexual reproduction may be the subject of a patent.