Answer - B.
Some of the aspects that get incorporated in the call to STS are.
The Amazon Resource Name (ARN) of the role that the app should assume.
The duration, which specifies the duration of the temporary security credentials.
A role session name, which is a string value that you can use to identify the session.
This value can be captured and logged by CloudTrail to help you distinguish between your role users during an audit.
Options A and D are incorrect because you need the session token to make requests to access other AWS resources.
Option C is incorrect because these tokens are short-lived.