Why is supply chain security relevant to physical security?

• A. To reduce packaging costs.
• B. To speed up deliveries from vendors.
• C. To simplify inventory counting.
• D. To prevent unauthorized access or tampering of assets and ensure trusted vendors.

Answer: (D)

Supply chain security matters for physical security because assets are vulnerable as they move through manufacture, shipment, storage, and handoffs. If components or equipment are tampered with or come from untrusted vendors, security weaknesses can be introduced into the facility or the company’s operations. Protecting the chain of custody—vetting vendors, using tamper-evident seals, securing receiving areas, and tracking shipments—helps ensure that only legitimate, trustworthy items enter the organization and stay protected. That focus on preventing unauthorized access or tampering and ensuring trusted vendors is what makes the option correct. The other choices center on cost reduction, faster delivery, or easier inventory counting, none of which directly address safeguarding assets or vendor trust.