A business unit wants you to commit to an availability target for a customer-facing assistant that is stricter than the published commitments of both the model provider and your managed vector store. What is the most appropriate response?

Answer: B — Derive the target from the dependencies' terms, define availability end to end, and design a degraded mode

(b) is right: end-to-end availability can't exceed what its dependencies provide, so derive the commitment from their published terms, define what 'available' means for the whole flow, and plan a communicated degraded mode. (a) overpromises; retries don't cover sustained outages. (c) is a misleading commitment. (d) confuses output variability with availability, which can be committed to.