A database specialist is building a system that uses a static vendor dataset of postal codes and related territory information that is less than 1 GB in size. The dataset is loaded into the application's cache at start up. The company needs to store this data in a way that provides the lowest cost with a low application startup time.
Which approach will meet these requirements?

A. Use an Amazon RDS DB instance. Shut down the instance once the data has been read.
B. Use Amazon Aurora Serverless. Allow the service to spin resources up and down, as needed.
C. Use Amazon DynamoDB in on-demand capacity mode.
D. Use Amazon S3 and load the data from flat files.