19 According to Taiwan Patent Law, there are several circumstances under which Taiwan IntellectualProperty Office may grant compulsory licensing of a patent. These grounds include:①where a patented invention is to be exploited non-commercially for the enhancement of publicinterest;②where a later invention or utility model patent cannot be exploited without infringing upon aprior invention or utility model patent, and where the later invention or utility model patentinvolves an important technical advancement of considerable economic significance in relationto the prior invention or utility model patent; or③ where a patentee has committed acts restricting competition or has committed unfaircompetition acts, for which a judgment has been made by a court of law or a decision has beenrendered by the Fair Trade Commission of the Executive Yuan.On what grounds shall a request for compulsory licensing of a patent involving semiconductortechnology be based?
(A)①or②only
(B)②or③only
(C)①or③only
(D)①,②or③