Which is a tool or technique used in scope definition?

A.
Templates, forms and standads

B.
Change requests

C.
Stakeholder analysis

D.
Project Assumptions

Explanation:
Stakeholder Analysis is done to prepare for the communication plan. Generally speaking, there are people with various degrees of interest in projects who have similar authority in an organization. Communications to these constituents needs to be respectful of their time.
This is an optimal output from the Discovery team.

The project may need services or support from individuals with:
Q1 — Low Authority and Low Interest, Monitor — Do not bore with excessive communications
Q2 — High Authority and Low Interest, Satisfy — Keep happy, do not bore
Q3 — High Authority and High Interest, Fully Engage
Q4 Low Authority and High Interest, Inform, Engage — Often very helpful with detail of project, issues
All types need to be properly motivated to participate.