A project manager is working on a project to launch a new internet service. The project manager plans that this work is to be done by the support team. The support team does not want to do the work because they do not have the necessary expertise and claim that they have never heard of the project. What is the root cause of this problem ?
A、Communication plan was not used.
B、Project manager did not involve all the stakeholders.
C、Support team is not prepared to do the task.
D、Project manager did not identify the risk about the lack of professional knowledge.