When outsourcing AI, the organization retains accountability for the model's decisions. The highest priority for an auditor is ensuring "Interpretability"--the ability of the vendor to provide tools or documentation that explain the model's rationale. Without this, the organization cannot satisfy regulatory requirements for transparency (e.g., GDPR Right to Explanation) or verify that the vendor's model is not biased. While SLOs (Option B) are important for operational uptime, they do not mitigate the ethical or legal risks associated with "Black Box" algorithms provided by third parties.