A User Is Launching an Instance

Multiple Choice

A user is launching an instance. He is on the "Tag the instance" screen. Which of the below mentioned information will not help the user understand the functionality of an AWS tag?

A) Each tag will have a key and value
B) The user can apply tags to the S3 bucket
C) The maximum value of the tag key length is 64 unicode characters
D) AWS tags are used to find the cost distribution of various resources