A company utilizing supplier relationship management (SRM) focuses on building long-term relationships with suppliers to create value and achieve competitive advantage. One of the key factors in SRM is the alignment of objectives and values between the company and its suppliers, which relates directly to the culture of the supplier. Ensuring a compatible culture allows for more effective communication, collaboration, and alignment of goals, which are crucial for a successful SRM implementation. Therefore, among the provided options, culture is the primary concern when selecting a supplier in an SRM framework.