The correct answer is D because enabling VPC Flow logs is essential for tracking all network flows. VPC Flow Logs capture a sample of network flows to and from VM instances, which are invaluable for network monitoring, forensics, real-time security analysis, and cost optimization. These logs are aggregated by connection at 5-second intervals and can be exported in real time for analysis using Cloud Pub/Sub and streaming APIs.

• Option A is incorrect because VPC logs are disabled by default and need to be enabled for auditing purposes.
• Option B is incorrect as there is no such feature as VPC Network logs.
• Option C is incorrect because disabling flow logs would prevent the security team from accessing the necessary network traffic data.
• Option D is the correct choice as it directly addresses the need for auditing network traffic by enabling flow logs.