B & C

"A universally required field is a custom field. It must have a value whenever a record is saved within
Salesforce, the Lightning Platform API, Connect Offline, Salesforce for Outlook, the Self-Service
portal, or automated processes, such as Web-to-Lead and Web-to-Case. Making a field required on
a page layout or through field-level security ensures that users must enter a value. Making a field
required universally gives you a higher level of data quality beyond the presentation level of page
layouts."


Source (page 24): https://resources.docs.salesforce.com/latest/latest/en-us/sfdc/pdf/smb_sales_impl_guide_2.pdf

B & C are correct answers.

answers are B,D

Link: https://help.salesforce.com/s/articleView?id=platform.fields_universally_required_field_considerations.htm&type=5

answers are B,C
A. The field is not required to save records via the API on that object. ❌
→ ❌ Incorrect — if a field is marked “Required” at the field-level (Object Manager), it is required everywhere, including the API, import wizard, Data Loader, Flows, and Apex.