Which tool provides cost management and optimization recommendations for Google Cloud resources?

Correct answer: Cloud Billing Reports and Recommender

Option C is correct because Google Cloud Billing Reports provide detailed visibility into spending across projects and services, while the Recommender service surfaces machine-learning-driven optimization recommendations including right-sizing, idle resource cleanup, and committed use discounts. Option A is wrong because Cloud Trace is an application performance management tool that analyzes latency in distributed applications and has no cost management function. Option B is wrong because Cloud Monitoring tracks infrastructure and application metrics and uptime, not billing data or cost optimization recommendations. Option D is wrong because Cloud Audit Logs record administrative activity and data access events for compliance and security purposes, not cost analysis.