Which of the Following Statements Is True of AWS Elastic

Which of the following statements is true of AWS Elastic Beanstalk?

A) AWS Elastic Beanstalk uses CloudWatch for monitoring and alarms, meaning CloudWatch costs are applied to your AWS account for any alarms that you use.
B) AWS Elastic Beanstalk uses CloudWatch for monitoring and alarms, and both are free of charge.
C) AWS Elastic Beanstalk doesn't use CloudWatch for monitoring and alarms, but you pay extra for any AWS Elastic Beanstalk Alarm you set in the monitoring tool.
D) AWS Elastic Beanstalk has its own free-of-charge monitoring tool, and you are not charged for the alarm you set.