对错畸形种族演化的叙述，不正确的是()

A．颌骨逐渐退化缩小

B．颅骨逐渐增大

C．咀嚼器官进化增强

D．出现牙列拥挤

E．以上都不是

When there is uncertainty associated with one or more aspects of the project．one of the first steps to take is to______．

A．revise project plan

B．conduct a risk benefit analysis

C．conduct a needs analysis

D．increase the estimated cost of the project