Your company is planning to use the EMR service available in AWS to run its big data framework and minimize the cost of running the EMR service. How would you achieve this?

Answer options:

A.Running the EMR cluster in a dedicated VPC
B.Choosing Spot Instances for the underlying nodes
C.Choosing On-Demand Instances for the underlying nodes
D.Disable automated backups

Correct Answer - B
AWS Documentation mentions the following.
Spot Instances in Amazon EMR provide an option to purchase Amazon EC2 instance capacity at a reduced cost compared to On-Demand purchasing.
For more information on Instance types for EMR, please visit the following URLs-
https://docs.aws.amazon.com/emr/latest/ManagementGuide/emr-instance-purchasing-options.html
https://docs.aws.amazon.com/emr/latest/ManagementGuide/emr-plan-instances-guidelines.html