A Nightly Batch Job Loads 1 Million New Records into a DynamoDB

Multiple Choice

A nightly batch job loads 1 million new records into a DynamoDB table. The records are only needed for one hour, and the table needs to be empty by the next night's batch job. Which is the MOST efficient and cost-effective method to provide an empty table?

A) Use DeleteItem using a ConditionExpression . Use DeleteItem using a ConditionExpression .
B) Use BatchWriteItem to empty all of the rows. BatchWriteItem to empty all of the rows.
C) Write a recursive function that scans and calls out DeleteItem . Write a recursive function that scans and calls out
D) Create and then delete the table after the task has completed.