All of the following are examples of a source of scope change EXCEPT ______ .

A) a variation in government regulations
B) failure to include a required feature in the design of a telecommunication system
C) discovering a need to engage in bottom-up cost estimating
D) introducing technology that was not available when scope was originally defined

初产妇，孕足月。腹胀12小时。体检：ROA，已%盆，胎心142次/分，宫缩60"/1～2min，妇烦躁不安。肛查：宫口1cm，S⁰，观察2小时，产程无进展。初步诊断为( )

A．先兆子宫破裂
B．高张性宫缩乏力
C．潜伏期延长
D．活跃期停滞
E．子宫强直性收缩