A. Level of support can be categorized as "supports actively", "supports", "neutral", "opposes", and "opposes actively". B. A stakeholder register helps project managers monitor the issues and concerns with stakeholders, and implement engagement strategies and tactics. C. A stakeholder register cannot be used as an input to the risk register because stakeholders are not considered one of the main risk sources and triggers. D. The stakeholder register should be based on a Power/Interest Grid to reflect the power and interest levels effectively