Which of the following controls is primarily focused on ensuring data accuracy during input?

The focus of the correct answer lies in the role of range checks as a specific control designed to enhance data accuracy during the input process. Range checks involve setting predefined limits or boundaries on what data can be entered into a system. For example, if a field requires a numeric input representing age, a range check can be applied to ensure that only numbers within a realistic range (like 0 to 120) can be entered. This validation helps prevent erroneous or nonsensical data from being accepted and processed, thereby maintaining the integrity of the information entered into the system.

In contrast, other options, while important in their own right, do not specifically target the accuracy of data input. Physical access controls primarily focus on controlling who can physically interact with data systems but do not directly ensure that the data entered is accurate. Segregation of duties is a critical principle that mitigates the risk of errors or fraud by dividing responsibilities among different individuals but does not directly ensure that each individual entry is accurate. Regular audits are important for reviewing processes and ensuring compliance; however, they are conducted after data input has occurred and thus do not focus on preventing inaccuracies at the point of data entry.