A company has resources hosted in its AWS Account. There is a requirement to monitor API activity for all regions and the audit needs to be applied for future regions as well. What would fulfill this requirement?

Answer options:

A.Ensure CloudTrail trail for each region, then enable trail for each future region.
B.Ensure one CloudTrail trail is enabled for all regions.
C.Create a CloudTrail for each region. Use CloudFormation to enable the trail for all future regions.
D.Create a CloudTrail for each region. Use AWS Config to enable the trail for all future regions.

Correct Answer – B
AWS Documentation mentions the following:
You can now turn on a trail across all regions for your AWS account. CloudTrail will deliver log files from all regions to the Amazon S3 bucket and an optional CloudWatch Logs log group you specified. Additionally, when AWS launches a new region, CloudTrail will create the same trail in the new region. As a result, you will receive log files containing API activity for the new region without taking any action. 
For more information on this feature, please visit the following URL:
https://aws.amazon.com/about-aws/whats-new/2015/12/turn-on-cloudtrail-across-all-regions-and-support-for-multiple-trails/