Could you please help me to correct those answers? Thank you.

[ Your answer is incorrect. Try again. Identify which basic principle of accounting is best described in each item below. (a) Norfolk Southern Corporation reports revenue in its income statement when the performance obligation is satisfied instead of when the cash is collected. Full Disclosure Yahoo! recognizes depreciation expense for a machine over the 2- year period during which that machine helps the company earn Measurement (historical cost) (b) revenue. Oracle Corporation reports information about pending lawsuits in Measurement (fair value) (c) the notes to its financial statements. Gap, Inc. reports land on its balance sheet at the amount paid to Revenue Recognition (d) acquire it, even though the estimated fair value is greater