—Mr. Harry, we want to hear what you think about the reform being carried out in our school. 

—OK, I _____ to that.

A．am coming

B．have come

C．came

D．come

将a％的乙醇和(100-a)％的乙醇溶液等体积混和后所得乙醇溶液的质量分数可能为[ ]

A．大于50％

B．小于50％　　

C．小于或等于50％

D．大于或等于50％