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Consider a scenario where you need to discover schemas from a data lake stored in S3 using AWS Glue, what steps would you take to ensure that the schemas are correctly identified and populated into the AWS Glue Data Catalog?
A
Manually inspect each file in the S3 bucket and enter schema information into the AWS Glue Data Catalog.
B
Use AWS Glue crawlers to automatically discover and populate schemas into the AWS Glue Data Catalog.
C
Write a custom ETL job to extract schema information and update the AWS Glue Data Catalog.
D
Assume that the schemas are already known and manually enter them into the AWS Glue Data Catalog.
