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An e-commerce firm uses AWS Lambda with API Gateway for order processing. Despite no Lambda log errors, some orders aren't processed after a POST API call. What's the developer's best troubleshooting step?
A
Review frontend logs for API issues and test the POST API with logs.
B
Examine the Lambda dead-letter queue for failed asynchronous invocations.
C
Check CloudWatch for Lambda errors that might have been overlooked.
D
Confirm POST API caching is disabled in API Gateway.
