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A Python AWS Lambda function reads from S3 and writes to DynamoDB, succeeding on S3 event triggers but failing on DynamoDB writes. What is the most likely cause?
A
Exceeded Lambda concurrency limit.
B
DynamoDB requires a GSI for write operations.
C
Lambda lacks necessary IAM permissions for DynamoDB writes.
D
Misalignment of Availability Zones between Lambda and DynamoDB.
