A company using AWS Organizations runs 150 applications across 30 accounts. It created a Cost and Usage Report in the management account that is delivered to an Amazon S3 bucket and replicated to a bucket in the data collection account. Senior leadership wants a custom dashboard that shows NAT gateway costs each day starting at the beginning of the current month. Which solution will meet this requirement?

The correct solution is to use Amazon QuickSight with Amazon Athena. QuickSight is a business intelligence service ideal for creating custom dashboards and visualizations from various data sources, including Cost and Usage Reports (CUR). Athena is an interactive query service that makes it easy to analyze data directly in Amazon S3 using standard SQL, making it perfect for querying the CUR files. Incorrect options: Using DataSync with QuickSight is incorrect because DataSync is a data transfer service, not a query engine for analytics. Using CloudWatch for a custom dashboard based on CUR data is incorrect. CloudWatch is primarily for monitoring operational data and metrics, not for detailed cost analysis from CUR files. Using DataSync with CloudWatch is incorrect for the reasons mentioned above; DataSync is for transfers, and CloudWatch is not the right tool for CUR-based custom cost dashboards.