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【单选题】
设有课程关系模式如下: R(C#,Cn,T,Ta)(其中C#为课程号,Cn为课程名,T为教师名,Ta为教师地址) 并且假定不同课程号可以有相同的课程名,每个课程号下只有一位任课教师,但每位教师可以有多门课程。该关系模式可进一步规范化为
A.
R1(C#,Cn,Ta),R2(T,Ta)
B.
R1(C#,Cn),R2(T,Ta)
C.
R1(C#,T),R2(T,Ta)
D.
R1(C#,Cn,T),R2(T,Ta)
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