Final answer:
The auditors should evaluate the design effectiveness of controls to ensure they are appropriate and effective in mitigating risks of material misstatement.
Step-by-step explanation:
The auditors should perform the next procedure, which is d. Evaluate the design effectiveness of controls. This involves assessing whether the identified controls are designed appropriately to mitigate the risks of material misstatement in the financial reporting. By evaluating the design effectiveness of controls, the auditors can determine whether they need to perform further tests of controls to ensure their effectiveness in preventing or detecting errors or fraud.