TheSoftware Security Framework (SSF)is intended to support entities usingbespoke and custom softwarewithin the Cardholder Data Environment (CDE). If the software is developed and maintained in accordance with theSecure Software Lifecycle (SLC) Standard, it can help demonstrate secure software development practices and potentially reduce the number of applicable PCI DSS requirements.
* Option A:Incorrect. Not all payment software qualifies unless developed under SSF standards.
* Option B:Incorrect. PCI PTS devices follow different hardware security standards.
* Option C:Incorrect. PA-DSS has been retired; those applications are now listed as "Acceptable Only for Pre-Existing Deployments".
* Option D:Correct. Software developed under the Secure SLC Standard may help an entity meet some requirements in PCI DSS Requirement 6.
Reference:PCI DSS v4.0.1 - Appendix F; Section 3, page 7; Secure Software Lifecycle (Secure SLC) Standard.

PerSection 6 - Sampling for PCI DSS Assessments, the assessor must ensure the sample of business facilitiesincludes all types and locations, reflecting different operational environments. The goal is to cover variations that might affect compliance, such as data centers vs. call centers, or regional differences.
* Option A:Incorrect. Each assessment may require a different sample depending on the environment.
* Option B:Incorrect. There is no fixed 10% requirement for facility sampling.
* Option C:Incorrect. A full review of every facility isn't required if representative sampling is used appropriately.
* Option D:Correct. The samplingmust include all types and locationsof facilities to be valid.
Reference:PCI DSS v4.0.1 - Section 6: Sampling for PCI DSS Assessments.