Question ID:PT72 S3 Q6 Passage:Astrophysicist: Gamma ray bursts (GRBs)‚ explosions of powerful radiation from deep space‚ have traditionally been classified as either "short" or "long," terms that reflect the explosion's relative duration. However, an unusual GRB has been sighted. Its duration was long, but in every other respect it had the properties of a short GRB. Clearly, the descriptive labels "short" and "long" have now outlived their usefulness. Stem:The conclusion of the astrophysicist's argument is most strongly supported if which one of the following is assumed? Correct Answer Choice:CChoice A:No other GRBs with unusual properties have been sighted. Choice B:The classification of GRBs can sometimes be made on the basis of duration alone. Choice C:Properties other than duration are more important than duration in the proper classification of the unusual GRB. Choice D:GRBs cannot be classified according to the different types of cosmic events that create them. Choice E:Descriptive labels are easily replaced with nondescriptive labels such as "type I" and "type II."