当烛焰与屏的距离为40cm时，在屏上成等大的像．则当物体与凸透镜相距30cm时，所成像的性质是______．若物体从离凸透镜50cm移至离凸透镜21cm的过程中，像的大小变化情况是______．

_____ my car is being made ready for a long journey. [ ]

A. In a moment

B. In the moment

C. For a moment

D. For the moment