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A canary deployment helps testing by

APromoting new code only on weekends
BRouting a small share of traffic to a new version
CReplacing all traffic at once with new code
DDisabling all health checks during deploys
Answer & Solution
Correct answer: B. Routing a small share of traffic to a new version
Canary deployment routes a small percentage (1-5%) of real traffic to the new version, monitors metrics and errors, then progressively shifts more traffic if healthy. Limits blast radius of bad releases.
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