100.View the Exhibit and examine the structure of the PROMOTIONS table.
100.ViewtheExhibitandexaminethestructureofthePROMOTIONStable.WhichSQLstatementsarevalid?(Chooseallthatapply.)A.SELECTpromo_id,DECODE(NVL(promo_cost,0),promo_cost,promo_cost*0.25,100)"Discount"FROMprom