analyzing，tracing，prioritizing and agreeing on requirements and then controlling changes and communicating to relevant stakeholders. It is a（）process throughout a project. A requirement is a capability to which a project outcome（product or service）should conform.

A、persistent

B、continuing

C、permanent

D、continuous

“社会是从简单到复杂，由低级到高级的直线式发展”。这是社会变迁（）的观点。