A virtual whiteboard is a technique that a business analyst can use to optimize effectiveness and build a shared understanding of an idea and approach with sales users in various locations. A virtual whiteboard is an online tool that allows multiple participants to collaborate visually by drawing, writing, or annotating on a shared screen. It can help them brainstorm ideas, create diagrams, or give feedback in real time. A demo prototype is a technique that can be used to show how an idea works or looks like, but not to collaborate on it.
One-on-one meetings are techniques that can be used to communicate with individual stakeholders, but not with a group. References: https://trailhead.salesforce.com/content/learn/modules/salesforce-business-analyst- certification-prep/collaboration-with-stakeholders https://trailhead.salesforce.com/content/learn/modules
/salesforce-business-analyst-certification-prep/user-stories

Explanation
The tool that the business analyst should use to accomplish the goal of optimizing CK's lead process is process mapping. Process mapping is a technique that creates a visual representation of how a business process flows from start to end. It can help the business analyst understand NTO's current lead process, identify areas of improvement, and communicate it effectively to stakeholders.Business analysis plan is a document that defines and describes how business analysis activities will be performed in a project or initiative. It can help the business analyst plan and manage their tasks, deliverables, resources, etc.Change management is a discipline that guides how people prepare for, respond to, and adopt change in an organization.

The role of the Business Analyst aligns with CK's needs for analyzing data, understanding business processes, and guiding implementation:
* Core Responsibilities: A BA bridges the gap between business needs and technical solutions, ensuring optimal process improvements like the lead-to-cash process.
* Salesforce Role Expectations: Salesforce BAs are trained to analyze data, document processes, and recommend best practices for implementations.
* Collaborative Approach: A BA works closely with stakeholders, solution architects, and administrators to ensure successful project delivery.

A definition of done is a set of criteria that determines when a user story is completed and ready for deployment. It typically includes technical, functional, and quality aspects of the user story, such as code quality, unit testing, documentation, performance, security, and usability. One possible definition of done for this user story is "The Candidate Status field can be updated." This criterion checks if the functionality of updating the candidate's submission progress is working as expected and meets the user's need. References:
https://trailhead.salesforce.com/en/content/learn/modules/business-analysis-user-stories/define-done