A standard fiscal year starts on January 1 and ends on December 31. A custom fiscal year can be set to start on any month and end on any month. In this case, Cloud Kicks wants its fiscal year to start on February 1 and end on January 31. This can be achieved by setting the fiscal year to Custom and the starting month to February.
Setting the fiscal year to Standard and the starting month to February will not work, as the standard fiscal year starts on January 1. Setting the fiscal year to Custom and the duration to 4 quarters will not work, as the duration of a fiscal year is 12 months. Setting the fiscal year to Standard and the duration to 12 months will not work, as the standard fiscal year starts on January 1.
Custom fiscal years are fiscal years that follow a custom-defined structure that differs from the Gregorian calendar. They can be used by organizations that have fiscal years that start on a different month than January or have fiscal years that are divided into custom periods such as quarters or weeks. To set up a custom fiscal year that starts on February 1 and has 12 months, an administrator needs to set the fiscal year to custom and the starting month as February in the fiscal year settings. Setting the fiscal year to standard or the duration to 4 quarters does not meet the requirement of having a custom fiscal year that starts on February 1. Reference: https://help.salesforce.com/s/articleView?id=sf.admin_fiscal_year.htm&type=5

A dependent picklist and a custom picklist are the two features that can be used to fulfill the requirement. A global picklist and a multi-select picklist are not features that can be used to fulfill the requirement.
Here is a more detailed explanation of why A and B are the correct answers:
a) Dependent Picklist
A dependent picklist is a picklist whose values are dependent on the value selected in another picklist. This is useful for ensuring that only valid values are selected for a field. In this case, the administrator can create a dependent picklist for the category field on accounts and cases, with the values for the picklist being dependent on the record type selected. This will ensure that only the relevant picklist values are available for selection based on the record type selected.
For example, the administrator could create a dependent picklist for the category field on accounts and cases with the following values:
Record Type: New Account
Picklist Values: Residential, Commercial
Record Type: Existing Account
Picklist Values: Renewal, Upsell, Cross-sell
This would ensure that only the relevant picklist values are available for selection when creating a new account or an existing account.
b) Custom Picklist
A custom picklist is a picklist that is created by the administrator. This is useful for creating picklists with values that are specific to the organization's needs. In this case, the administrator can create a custom picklist for the category field on accounts and cases, with the values for the picklist being specific to the organization's needs. This will ensure that the picklist values are relevant to the organization and its customers.
For example, the administrator could create a custom picklist for the category field on accounts and cases with the following values:
Picklist Values: Residential, Commercial, Land, Multi-Family
This would ensure that the picklist values are relevant to the organization and its customers.

When you delete a custom field, the data in that field is stored for 20 days before it is permanently deleted. During this time, you can restore the field and its data from the Recycle Bin or use Data Loader to export the data. Reference: https://help.salesforce.com/s/articleView?id=sf.customize_del_field.htm&type=5

Setup audit trail is a tool that allows administrators to review recent configuration changes made in their org. It shows a list of up to 180 days of setup changes made by anyone in the org, including the date, time, user, and type of change. It can help administrators track who made what changes and when, and troubleshoot any issues caused by configuration changes. Critical updates are notifications that inform administrators of new features or enhancements that may impact their org; they do not show configuration changes made by users. Debug logs are records of database operations, system processes, and errors that occur when executing a transaction or running unit tests; they do not show configuration changes made by users either. Field history tracking is a feature that allows administrators to track changes to the values of certain fields on records; it does not show configuration changes made in setup. Reference: https://help.salesforce.com/s/articleView?id=sf.monitorsetup.htm&type=5

Two reasons that would prevent a user from being deactivated are that the user is part of a territory hierarchy or that the user is assigned in workflow email alert. A territory hierarchy is a structure that defines how territories are related to each other in Salesforce; if a user is part of a territory hierarchy, they cannot be deactivated until they are removed from all territories. A workflow email alert is an action that sends an email to one or more recipients when a workflow rule is triggered; if a user is assigned in workflow email alert, they cannot be deactivated until they are removed from all email alerts. The user being in a custom hierarchy field or being the highest role in role hierarchy are not reasons that would prevent deactivation; they may affect data visibility or record ownership after deactivation, but they do not block deactivation itself. Reference: https://help.salesforce.com/s/articleView?id=sf.users_deactivate_considerations.htm&type=5