In which of the following excerpts does the writer try to gain credibility by referencing scientific studies?A. Newsome, who had never before been arrested, spent 15 years in a rat-infested prison serving a life sentence. That's how long it took for fingerprint technology to develop that would prove the prints left at the scene by the killer weren't Newsome's. For five years police knew, but didn't divulge, that the prints belonged to Dennis Emerson, a career criminal. B.Take the experience of Chicagoan James Newsome. His was not a capital case, but the lessons apply to all felony prosecutions. Newsome was driving with a friend on Halloween in 1979 when police stopped them, guns drawn, as possible suspects in the robbery of a prostitute. C.The live lineup is a staple of modern-day police work in many station houses, Chicago in particular. Anyone who has watched police dramas on film or television knows how it works. D.Thanks to a generation's worth of research, we know an awful lot about the fickleness of memory. We know eyewitness accounts of crimes are fragmented and suggestible. We know they're apt to go from shaky to confident between the time a cop confirms a witness's lineup choice ("You picked the right guy") and the start of trial.