Final answer:
The best order to run the test cases is C. 2, 5, 6, 4, 1, 3. This order prioritizes test cases based on risk and considers any dependencies between them.
Step-by-step explanation:
The best order to run the test cases is: C. 2, 5, 6, 4, 1, 3. The test cases should be run in order of risk priority, with high-risk cases being prioritized. Additionally, there are dependencies between some of the test cases, so those should be considered as well. By following this order, you can provide feedback to the developers quickly and efficiently.