The unorthodox structure mentioned in option C involves business analysts performing alpha testing.
Typically, alpha testing is conducted by internal staff or a team close to the development environment, not specifically by business analysts. This step is unusual as business analysts are generally responsible for requirements analysis and ensuring that the developed system meets business needs, rather than conducting alpha testing, which is more focused on identifying bugs and issues from a user's perspective.
References:
ISTQB Glossary, Distributed Testing
ISTQB Advanced Level Test Manager Syllabus, Section 3.2.1
Related literature on testing roles and responsibilities