Answer: Enable flow logs.

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.

Author: LeetQuiz Editorial Team