The data security default policy capable of scanning for vulnerabilities is "Objects containing Malware". In cloud security, malware scanning is an essential feature of CSPM tools that allows for the identification of malicious software within objects stored in the cloud. A policy that scans for objects containing malware ensures that any files or code bases in the cloud environment are examined for potential threats, protecting the cloud resources from being compromised.

Prisma Cloud supports different scanning modes for its agentless scanning feature. Based on the context of cloud environments and typical terminology used in Prisma Cloud documentation, "Spoke Account Mode" and "Hub Account Mode" are plausible modes supported for agentless scanning. These modes allow for the extension of scanning capabilities across multiple accounts, with 'Spoke' typically referring to linked accounts and 'Hub' referring to the central account in a hub-and-spoke architecture. Hence, the correct answers are A and B.