Venture capital investments used to provide capital for companies initiating commercial manufacturing and sales are most likely to be considered a forma of（）

A. first-stage financing.

B. mezzanine financing.

C. expansion-stage financing.

正常枕先露分娩时，仰伸发生在

A．胎头着冠时
B．胎头拨露时
C．胎头枕骨在耻骨联合后时
D．胎头枕骨下部到达耻骨联合下缘时
E．胎头后囟在耻骨弓下露出时