单项选择题

在工程中,利用侧限压缩试验确定该土为中压缩性土,则该土的压缩系数为( )

A.a1-2<0.1MPa-1
B.0.1MPa-1<a1-2<0.5MPa-1
C.0.5MPa-1<a1-2<0.8MPa-1
D.a1-2>0.8MPa-1