In which business object do you configure whether material purchasing from a supplier must be...

Configuring a quality department release for supplier-material purchasing is managed in:

Quality Info Record: Procurement (D): The quality info record (transaction QI01) includes a "Release Required" indicator and status profile settings, allowing the quality department to approve or block purchasing from a supplier for a material. This is the standard object for supplier-specific QM controls (SPRO > QM > Quality Inspection > Quality Info Record).

Business Partner (A): Manages supplier data but not QM release requirements.

Material Master (B): Defines inspection types but not supplier-specific release by the quality department.

Inspection Plan (C): Specifies inspection details, not release processes.

Thus, "Quality info record: Procurement" is the correct answer.References: SAP Help Portal - "Quality Info Record in Procurement"; SAP S/4HANA QM UserGuide - "Supplier Management".