The correct answer is B: Use Migration Evaluator to perform an analysis. Use the data import template to upload the data from the CMDB export.

Explanation:

1. Migration Evaluator:

   • Migration Evaluator (formerly known as TSO Logic) is a tool specifically designed to create detailed business cases for migrations to AWS. It provides insights into potential cost savings and efficiencies that could be achieved by moving workloads to the cloud.

2. Cost-effective analysis:

   • This tool offers a cost-effective way to analyze on-premises workloads versus AWS cloud costs. It uses data from your current infrastructure and provides a detailed report on potential savings and benefits.

3. Data import template:

   • Migration Evaluator includes a data import template, which can be populated with the data from your CMDB export. This allows the solutions architect to easily input all relevant server information into the evaluation tool.

4. Ease of Use and Accuracy:

   • The tool provides a straightforward process for uploading and analyzing data, resulting in accurate and actionable recommendations without needing complex configurations or extensive manual effort.

These characteristics make Migration Evaluator the optimal and most cost-effective choice for generating a business case for migration to AWS, which aligns with the requirements stated in the question.