单项选择题

高压缩性土,其压缩系数a1-2应满足的条件是:()

A.0.1MPa≤a1-2<0.5MPa
B.a1-2<0.1MPa
C.0.1MPa≤a1-2<0.3MPa
D.a1-2≥0.5MPa