The Customer info record: SD defines inspection requirements.

The quality info record: SD (transaction QVDM) specifies QM requirements for outbound deliveries:

Customer and Sales Organization (A): This combination allows generic inspection settings for a customer across a sales organization, a valid standard option.

Customer, Material, and Sales Organization (B): This is the most specific combination, enabling material-specific inspection requirements for a customer within a sales org (SPRO > QM > Quality Inspection > Quality Info Record: SD).

Customer, Material, and Division (C): Division isn’t a key field for the SD info record in standard SAP.

Customer, Material, and Distribution Channel (D): Distribution channel isn’t part of the key; sales org is used instead.

Thus, "A" and "B" are the correct answers.References: SAP Help Portal - "Quality Info Record: SD"; SAP S/4HANA QM User Guide - "SD Quality Management".