Presented here is selected information from recent 10-K reports of four companies. The four companies, in alphabetical order are: Advanced Micro Deliveries a global semiconductor company AT&T a company that provides communications and digital entertainment Caterpillar, Inc. a manufacturer of heavy machinery Pfizer, Inc. a pharmaceutical manufacturer The data for the companies, presented in the order of amount of their sales in millions of dollars, are as follows: A B C D Sales $170,756 $54,722 $53,647 $9,581 Cost of goods sold 79,419 36,997 11,248 5,361 Net earnings 19,953 6,147 11,153 424 Inventory --------- 11,529 7,508 4,363 Accounts receivable 26,472 17,452 8,025 625 Total assets 531,864 78,509 159,422 9,041 Based on these financial data as well as your knowledge and assumptions about the nature of the businesses that the companies operate, determine which data relate to which companies. Explain your decision, including a discussion of which ratios you used in your analysis.