You need to design an automation solution for the final-release build process.
Which approach should you recommend?

A.
Use Web application configuration file transforms.

B.
Create a custom configuration section for each build configuration value.

C.
Append the ConfigSource attribute to each application configuration section.

D.
Duplicate each configuration section for the debug build configuration, and modify the settings for the release build configuration.

Explanation:
Configuration transforms are the simplest way to providesupport for using different configuration settings in different environments. Use configuration transforms to automatically publish different configuration settings to different environments.