Which of the following statements about Enron Scandal are/is true?

I. Enron had used hundreds of special purpose vehicle to hide flaws in its actual financial performance. As a result, Enron's balance sheet understated its liabilities and overstated its equity, and its earnings were overstated.

II. Enron built a physical asset and then immediately declare a projected mark-to-market profit on its books, but didn't do this when it had not yet made any money from the physical asset.

III. Enron outsourced its audit function to Arthur Andersen. And Andersen neither failed to catch nor explicitly approved many of fraudulent accounting practices that led to Enron's collapse.