Your company has an application hosted in AWS which makes use of DynamoDB. There is a requirement from the IT security department to ensure that all source IP addresses which make calls to the DynamoDB tables are recorded. Which of the following services can be used to ensure this requirement is fulfilled.

Answer options:

A.AWS Code Commit
B.AWS Code Pipeline
C.AWS CloudTrail
D.AWS Cloudwatch

Answer - C
The AWS Documentation mentions the following
DynamoDB is integrated with CloudTrail, a service that captures low-level API requests made by or on behalf of DynamoDB in your AWS account and delivers the log files to an Amazon S3 bucket that you specify. CloudTrail captures calls made from the DynamoDB console or from the DynamoDB low-level API. Using the information collected by CloudTrail, you can determine what request was made to DynamoDB, the source IP address from which the request was made, who made the request, when it was made, and so on. 
For more information on DynamoDB and Cloudtrail, please refer to the below link:
http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/logging-using-cloudtrail.html