在SQL SERVER中,声明并创建以下存储过程,正确调用该存储过程的的语句是( )。CREATE PROCEDURE PRO@passNum int OUTPUT,@passPoint int=60ASSelect @passNum=count(*) From stuTable Where point >@passPointGO A. Declare @sum int; EXEC PRO @passNum,70 B. EXEC PRO 70 C. Declare @sum int; EXEC PRO @sum output,70 D. Declare @sum int; EXEC PRO @sum output