What is the fastest approach an Architect should recommend?

Universal Containers is in the process of testing their integration between salesforce and their on-premise ERP systems. The testing team has requested a sandbox with up to 10,000 records in each object to benchmark the integration performance.

What is the fastest approach an Architect should recommend?
A . Spin off a partial copy sandbox using a sandbox template with all the objects required for testing the integration.
B. Spin off a Developer pro sandbox, migrate the metadata and load the data using data loader.
C. Spin off a full copy sandbox with all the objects that are required for testing the integration.
D. Spin off a Development sandbox, migrate the metadata and load the data using data loader.

Answer: A