Final answer:
To participate in an EnerGuide Rating System test, you must submit building plans, schedule a blower door test, and provide equipment specifications; thus, all the mentioned steps are required.
Step-by-step explanation:
The steps that must be followed for participating in testing under the EnerGuide Rating System include submitting building plans, scheduling a blower door test, and providing equipment specifications. Therefore, the correct answer is D) All of the above. Submitting detailed building plans is essential for the evaluators to understand the construction and features of the building to be tested. Scheduling a blower door test is a key step to assess the airtightness of a building. Providing equipment specifications ensures that all the building components are accounted for in the energy performance assessment. These steps are crucial to accurately determine the EnerGuide rating, which reflects the energy efficiency of the building.