The Supplier Portal in Oracle Fusion Cloud Procurement is a collaborative platform that allows suppliers to manage purchase orders (POs), invoices, and real-time interactions with buyers. Suppliers can view POs, submit invoices, update shipment details, and respond to queries, enhancing transparency and efficiency. Option A is incorrect because the portal includes both POs and invoices, not just one. Option C is false—suppliers can update account details like contact or banking information, subject to approval workflows. For example, a supplier receiving a PO for 200 units can confirm delivery dates and submit an invoice directly through the portal, reducing email exchanges and delays. This feature streamlines procurement, improves supplier relationships, and ensures data accuracy across the supply chain.