Welcome to our club. You will be accepted as members ________ your age and sex. [ ]

A. because of  

B. regardless of

C. in case of  

D. in place of

飞行区指标I分为1、2、3、4四个等级，这个分级是按照拟使用跑道的各类飞机中最长的基准飞行场地长度来划分的。