已知一个直角三角形的两条边的长分别为3和5，则第三条边的长为                   。

The following footnote appeared in Crabtree Company’ s 20×7 annual report: "On December 31, 20×7, Crabtree recognized a restructuring charge of $ 20 million, of which $ 5 million was for severance pay for employees who will be terminated in 20×8 and $15 million was for land that became permanently impaired in 20×7. " Based only on these changes, Crabtree’ s net profit margin and fixed asset turnover ratio in 20× 8 as compared to 20×7 will beNet profit margin Fixed asset turnover（）①A. Higher Higher ②B. Lower Unchanged ③C. Higher Unchanged

A. ①

B. ②

C. ③