单项选择题

A.K≤0.1μm2时含油量≤5.0mg/L
B.K≤0.1μm2时含油量≤7.0mg/L
C.K≤0.1μm2时含油量≤8.0mg/L
D.K≥0.1μm2时含油量≥10.0mg/L