Rider, a bus passenger, sued Transit Company for injuries to his back from an accident caused by Transit's negligence. Transit denies that Rider received any injury in the accident."Transit Company calls Observer to testify that right after the accident, Rider told him that he had recently suffered a recurrence of an old back injury. The judge should rule Observer's testimony
admissible, as an admission of a party opponent.  admissible, as a spontaneous declaration.  inadmissible, because it is irrelevant.  inadmissible, because it is hearsay, not within any exception