下列有关生态系统组成成分的叙述，正确的是[ ]

A．太阳光来源于地球以外，不属于生态系统的成分

B．硝化细菌是自养生物，在生态系统中属于生产者

C．病毒是异养生物，在生态系统中属于分解者

D．蚯蚓是需氧生物，在生态系统中属于消费者

While the project is being completed, management requests a change. What is
the FIRST thing the project manager should do

A) Comply with the request if possible.
B) Obtain a complete understanding of the scope of the change.
C) Teel the customer that a change will be coming.
D) Ask the team to accept the change.