Explanation
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.