A company provides an API interface to customers so the customers can retrieve their financial...

Provisioned concurrency is the key requirement match because AWS documentation states that it pre-initializes Lambda execution environments and is designed to reduce cold-start latency, supporting predictable response times in the double-digit millisecond range. That makes it ideal for APIs that must remain consistently low-latency during peak traffic periods. Reserved concurrency does not solve cold starts; it only reserves capacity. ECS and EKS could certainly host the API, but both introduce more infrastructure management than API Gateway plus Lambda. Since the question asks for theleast operational overheadwhile maintaining consistent low latency, the serverless pattern with API Gateway and Lambdawith provisioned concurrencyis the strongest AWS-native answer. (AWS Documentation)

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