Which of the following is true regarding the behavior of Spring Boot's auto-configuration feature when multiple configuration classes are present in a project?

A. Spring Boot uses a priority order to determine which configuration class takes precedence, with higher priority classes overriding lower priority ones.

B. Spring Boot randomly selects one of the configuration classes to use for auto-configuration.

C. Spring Boot throws an error and fails to start the application if multiple configuration classes are present.

D. Spring Boot combines the configuration from all classes, resulting in potentially conflicting or redundant settings.