Question ID:PT33 S3 Q21 Passage:Some government economists view their home countries as immune to outside influence. But economies are always open systems; international trade significantly affects prices and wages. Just as physicists learned the shortcomings of a mechanics based on idealizations such as the postulation of perfectly frictionless bodies, government economists must look beyond national borders if their nations' economies are to prosper.  Stem:The argument's conclusion follows logically if which one of the following is assumed? Correct Answer Choice:AChoice A:A national economy cannot prosper unless every significant influence on it has been examined by that nation's government economists. Choice B:Economics is weakly analogous to the physical sciences. Choice C:Economic theories relying on idealizations are generally less accurate than economic theories that do not rely on idealizations. Choice D:International trade is the primary significant variable influencing prices and wages. Choice E:Some government economists have been ignoring the effects of international trade on prices and wages.