What action should the Developer perform to make this error human-readable?

A Developer executed a AWS CLI command and received the error shown below:

What action should the Developer perform to make this error human-readable?
A . Make a call to AWS KMS to decode the message.
B . Use the AWS STS decode-authorization-message API to decode the message.
C . Use an open source decoding library to decode the message.
D . Use the AWS IAM decode-authorization-message API to decode this message.

Answer: B

Explanation:

https://docs.aws.amazon.com/cli/latest/reference/sts/decode-authorization-message.html

The message is encoded because the details of the authorization status can constitute privileged information that the user who requested the operation should not see. To decode an authorization status message, a user must be granted permissions via an IAM policy to request the DecodeAuthorizationMessage (sts:DecodeAuthorizationMessage ) action.