What requirement is common among all SAQs mentioned?

The correct choice highlights that all Self-Assessment Questionnaires (SAQs) mandate no electronic processing of cardholder data as a common requirement. This is significant because organizations that utilize SAQs typically engage in low-risk payment environments where either the processing or storage of cardholder data is minimal or handled entirely by third-party vendors.

The rationale behind this requirement is closely aligned with the Payment Card Industry Data Security Standards (PCI DSS) framework, which aims to minimize the risk exposure of cardholder data. By ensuring that businesses do not electronically process cardholder information, the chance of data breaches is reduced, providing an additional layer of security.

Moreover, organizations aiming to follow PCI compliance may rely on third-party payment processors to handle electronic transactions effectively. This further emphasizes the importance of ensuring no direct electronic handling of cardholder data occurs, simplifying compliance efforts and reducing the burden of maintaining stringent security controls in-house.

Therefore, while other choices might pertain to specific scenarios or advanced requirements, the notion that there is no electronic processing of data serves as a foundational principle that unites the various types of SAQs within the PCI DSS compliance landscape.