A. Sales records for baseball cards gathered by the industrystrade council.B. Da

A. Sales records for baseball cards gathered by the industrystrade council.B. Data from sales records kept by exclusive dealers of Toppshologram seriesC. An article about the hologram cards in a recent issue of SportsIllustratedD. Input from focus groups that was put together specifically todiscuss their perception of popularity of the hologram cardseries.