Price sued Derrick for injuries Price received in an automobile accident. Price claims that Derrick was negligent in (a) exceeding the posted speed limit of 35 m.p.h., (b) failing to keep a lookout, and (c) crossing the center lineBystander, Price's eyewitness, testified on crossexamination that Derrick was wearing a green sweater at the time of the accident. Derrick's counsel calls Wilson to testify that Derrick's sweater was blue. Wilson's testimony is
admissible as substantive evidence of a material fact. admissible as bearing on Bystander's truthfulness and veracity. inadmissible, because it has no bearing on the capacity of Bystander to observe.  inadmissible, because it is extrinsic evidence of a collateral matte