A regression test suite for a generative feature asserts that a given prompt returns an exact string. It passes locally and fails intermittently in the pipeline, with no code changes. What is the underlying issue?

• AThe pipeline is sending malformed requests that the local environment corrects.
• BGenerative models are nondeterministic, so asserting on an exact string is the wrong kind of test.
• CThe model is overfitted to the prompts used during development.
• DToken limits are being exceeded in the pipeline but not locally.