Question ID:PT92 S1 Q13 Passage:Philosopher:  As many prominent physicists have suggested, energy is merely a theoretical construct. Since the theory of relativity tells us that there is no essential distinction between energy and mass, mass must also be a theoretical construct. But all physical objects are composed purely of mass and energy. Thus, physical objects must also be theoretical constructs. Stem:The philosopher's argument is most vulnerable to criticism on which one of the following grounds? Correct Answer Choice:BChoice A:It fails to consider whether anything other than physical objects may be composed purely of mass and energy. Choice B:It overlooks the possibility that something may lack a feature even if it is composed purely of things that have that feature. Choice C:It presumes, without providing justification, that two things may have different features even if there is no essential distinction between them. Choice D:It fails to address adequately the possibility that a feature of some theoretical constructs need not be shared by every theoretical construct. Choice E:It presumes, without providing justification, that the fact that a suggestion has been made by a physicist proves the truth of that suggestion.