A Digital Developer suspects a logical error in a script.

To locate a logical error in a script within Salesforce B2C Commerce, the most effective approach is to utilize debugging tools that allow breakpoints and examination of variable values. This method, option C, involves putting breakpoints in the script where the developer suspects the error might be occurring. By stepping through the code and examining the values of variables at these breakpoints, the developer can observe the script's execution flow and pinpoint where things go awry. This hands-on debugging approach provides direct insight into the script’s behavior, which is crucial for identifying and resolving logical errors. Details on setting breakpoints and debugging can be found in the "Debugging Scripts" section of the Salesforce Commerce Cloud documentation.