Your company has lot of Patient data stored on S3 and has finally decided to use Spark for performing various kind of data analysis on S3. The security team in the company has asked the project teams to follow data encryption best practices on EMR. Which of the following data encryption mechanisms are supported by EMR?

Answer options:

A.LUKS encryption
B.SSE-C
C.SSE-KMS
D.Transparent Data Encryption

Option B is incorrect: SSE with customer-provided keys (SSE-C) is not available for use with Amazon EMR.
Option D is incorrect: Transparent Data Encryption is supported by RDS
SSE-KMS and LUKS encryption is supported on EMR clusters
https://docs.aws.amazon.com/emr/latest/ManagementGuide/emr-data-encryption-options.html