When a business analyst discovers that different teams have different needs or preferences for using Salesforce fields, they should refine the requirements to accommodate both teams. This is because deleting fields that are actively used by another team could cause data loss, errors, or inefficiencies in their processes. The business analyst should work with both teams to understand their use cases, data models, workflows, reports, dashboards, integrations, security settings, etc., and find ways to customize Salesforce fields that meet both teams' needs without compromising data quality or performance. References:
https://trailhead.salesforce.com/content/learn/modules/salesforce-business-analyst-certification-prep/requirement

Explanation
The business analyst should review the version control history to understand which user stories were modified by the project lead. Version control is a system that records changes to a file or set of files over time so that you can recall specific versions later. Version control can help track who made what changes, when, and why.
It can also help compare different versions, merge changes, resolve conflicts, and restore previous versions.
The business analyst should use a version control system to store and manage their user stories in a repository and review the version control history to see the edits made by the project lead. Reviewing the approval history is not a good option because it would only show who approved or rejected the user stories, not who modified them or how. Reviewing the change sets history is not a good option because it would only show what metadata components were deployed or retrieved between orgs, not what user stories were modified or how. References:
https://trailhead.salesforce.com/en/content/learn/modules/org-development-model/get-to-know-org-development

Explanation
Working Hours is not a Locale Setting that can be selected when creating a new user. Working Hours are set at the organization level or at the resource level for scheduling purposes. Time Zone, Language, and Locale are Locale Settings that can be selected when creating a new user. References:
https://help.salesforce.com/s/articleView?id=sf.users_add.htm&type=5

The minimum viable product (MVP) is the version of a product that has just enough features to satisfy early customers and provide feedback for future development. The MVP should focus on the items that are essential to the business value and goals, not on the items that are nice to have or preferred by some users. Therefore, the business analyst should prioritize the items that are crucial to the business over the items that are user-friendly features or requested by the majority of users. References:
* Certification - Business Analyst - Trailhead, under "About the Exam"
* Get Started with Salesforce Business Analyst Certification Prep, under "The Salesforce Business Analyst Certification"
* Cert Prep: Salesforce Business Analyst | Salesforce Trailhead, under "Get Started with Salesforce Business Analyst Certification Prep"