Allocating a CPU reservation can help ensure the VM's CPU scheduling priority in oversubscribed environments. The other options relate to memory ballooning (A), disk scheduling (C), and snapshot limits (D), which do not directly address CPU contention.

Secure log transfer (A), least-privilege RBAC (C), and robust change management (D) align with common compliance frameworks. Disabling logs (B) contradicts audit requirements.

For vSAN, ensuring adequate flash cache capacity and performance is crucial to avoid storage bottlenecks. CPU frequency is important but less critical for vSAN's storage layer, the vCenter license does not govern performance, and VMFS extents are not used in vSAN datastores.

Lockdown Mode (A), dedicated management networks (C), and centralized authentication (D) are recommended for securing hosts. Allowing all SSH connections (B) is a security risk.

Automated patch management ensures that database instances are kept up-to-date with the latest patches, which is essential for maintaining compliance and security.
Encryption of data at rest and in transit helps protect sensitive database data from unauthorized access and tampering, ensuring compliance with security standards.
Role-based access control (RBAC) restricts database access based on user roles, ensuring that only authorized users have access to sensitive data, which is crucial for compliance and security.