The CFO of a Company Wants to Allow One of His

The CFO of a company wants to allow one of his employees to view only the AWS usage report page. Which of the below mentioned IAM policy statements allows the user to have access to the AWS usage report page?

A) "Effect": "Allow", "Action": ["Describe"], "Resource": "Billing"
B) "Effect": "Allow", "Action": ["AccountUsage], "Resource": "*"
C) "Effect": "Allow", "Action": ["aws-portal:ViewUsage"], "Resource": "*"
D) "Effect": "Allow", "Action": ["aws-portal: ViewBilling"], "Resource": "*"