The correct answers are A and E because Guidewire InsuranceSuite is designed to support a high degree of configuration-driven adaptation without requiring heavy custom development. A major principle of the platform is that insurers should be able to tailor system behavior through configuration tools, settings, and rules rather than rewriting the underlying application.

A. Adjusting system parameters and options through administrative tools is correct because many aspects of application behavior can be influenced through configurable settings. These parameters allow organizations to control processing options, operational behavior, and certain functional preferences in a managed way, often without source code changes. This is one of the most direct examples of adapting the application while staying within the standard platform approach.

E. Utilizing the built-in business rules engine to define conditional logic is also correct because Guidewire uses configurable rules to control decision logic, validations, automation, assignments, and other behavior. This is one of the most important mechanisms for tailoring how the application works for a specific insurer while preserving the base architecture.

The remaining choices are less appropriate. B and F involve substantial custom development rather than lightweight tailoring. D is not aligned with the normal Guidewire approach and would bypass standard application configuration practices. C does involve configuration, but it mainly controls access and authorization rather than broadly tailoring the application's behavior and appearance in the sense intended by the question.

So the best two examples of adapting InsuranceSuite without extensive custom code are adjusting configurable system options and using the built-in rules engine .