Question ID:PT89 S4 Q24 Passage:A theory cannot properly be regarded as empirical unless there is some conceivable observation that, if the theory were false, would refute it. Stem:The principle above most helps to justify which one of the following? Correct Answer Choice:CChoice A:Since no one was present at the origin of the universe, the Big Bang theory of the universe's origin is not an empirical theory. Choice B:Since set theory is not an empirical theory, there is no conceivable observation that would refute it. Choice C:Psychoanalysis is such a flexible theory that no conceivable observation could show it to be false, so it is not an empirical theory. Choice D:There are conceivable observations that would refute quantum theory, so quantum theory is an empirical theory. Choice E:The theory of relativity must be true since, although scientists have conceived of observations that would refute it, it has not yet been refuted.