A.σb:a>b>c,E:a>b>c,δ:b>c>a
B.σb:a>b>c,E:b>a>c,δ:c>b>a
C.σb:a>b>c,E:c>b>a,δ:c>b>a
D.σb:a>b>c,E:b>a>c,δ:b>c>a
正确答案是B