Amazon, as an e-commerce giant, has achieved great success in online retail. Choose from the following that states its accomplishment.
A、In 2015, Amazon surpassed Walmart as a Fortune 500 enterprise.
B、In 2015, Amazon was the world-wide fourth most valuable public company.
C、In 2015, Amazon became the world largest revenue volume internet company.
D、In 2015, Amazon was the eighth largest US employer.