To prevent users from selecting more than one value on a picklist field, the administrator needs to change the field type from a multi-select picklist to a regular picklist, and select the “Choose only one value” checkbox on the field definition page. This w ill ensure that only one value can be selected on the record page and in reports and filters. References: htt ps://help.salesforce.com/s/articleView?id=sf.customize_picklists.htm & type=5

Mass delete records and data loader are two tools that can be used by Ursa Major Solar administrator undo import records into object mistake. Mass delete records tool all ows administrators delete large numbers records meet certain criteria once setup interface; it can used undo import records into object mistake selecting records imported mistake deleting them mass delete records tool setup interface Data loader tool allow s administrators import export delete large numbers records using CSV files command line interface API calls; it can used undo import records into object mistake using CSV file contains IDs records imported mistake deleting them data loader tool command li ne interface API calls Weekly data export data import wizard are not tools undo import records into object mistake because they either export import records but not delete them. References: https://help.salesforce.com/s/articleView?id=sf.admin_massdelete.h tm & type=5 https://help.salesforce.com/s/articleView?id=sf.data_loader.htm & type=5

The contact hierarchy is a feature that allows users to view contacts related to an account in a hierarchical tree structure based on their role or position within the account. The contact hierarchy respects record-level access by user, meaning that users can see only those contacts that they have access to based on their profile permissions and sharing settings. The other options are incorrect because contac t hierarchy is not limited to 3,000 contacts at one time (it can display up to 5,000 contacts), customizing hierarchy columns does not change the recently viewed contacts list view (it only affects how contacts are displayed in the hierarchy), and sharing settings are not ignored by contacts displayed in the contact hierarchy (they determine which contacts are visible to users). References: https://help.salesforce .com/s/articleView?id=sf.contacts_hierarchy.htm & type=5

To test the impact of a critical update before it is auto-activated, you should activate it in a sandbox first. This way, you can verify that your customizations and integrations work as expected without affecting your production org.

References: https://help.salesforce.com/s/articleView?id=sf.admin_critical_updates.htm & type=5