_____ the right decisions _____ the future is probably the most important thing we'll ever do in our lives. [ ]

A. Making; concerned

B. Make; concerning

C. To make; concerned

D. Making; concerning

下列说法正确的是：

A．正常成人眼球的矢状径平均23.5mm．

B．正常成人眼球的垂直径平均24mm．

C．正常成人眼球的水平径平均24mm．

D．角膜表面的中央称前极，巩膜后面的正中称后极．

E．将距离前极和后极相等的各点连成一线，称子午线．