13 According to the R.O.C. Patent Act, an invention which is industrially applicable may be granted apatent upon application in accordance with the Patent Act. Which of the following is not an exceptionto patentability?
(A) The invention was disclosed in a printed publication prior to the filing of the patent application.
(B) The invention was publicly exploited prior to the filing of the patent application.
(C) The invention was publicly known prior to the filing of the patent application.
(D) The invention cannot be easily made by a person ordinarily skilled in the art based on prior art.