Which of the following aspects of the AWS Config service is a collection of the configuration items for a given resource over any time

Answer options:

A.Configuration Recorder
B.Configuration History
C.Configuration Stream
D.Configuration Snapshot

Answer - B
The AWS documentation mentions the following
A configuration history is a collection of the configuration items for a given resource over any time period. A configuration history can help you answer questions about, for example, when the resource was first created, how the resource has been configured over the last month, and what configuration changes were introduced yesterday at 9 AM. The configuration history is available to you in multiple formats. AWS Config automatically delivers a configuration history file for each resource type that is being recorded to an Amazon S3 bucket that you specify. You can select a given resource in the AWS Config console and navigate to all previous configuration items for that resource using the timeline. Additionally, you can access the historical configuration items for a resource from the API.
For more information on the concepts of AWS config, please visit the link:
http://docs.aws.amazon.com/config/latest/developerguide/config-concepts.html