C
While defining requirements, there is need to define three requirements of the project- Business requirement, Functional requirement, and Technical requirement Functional requirements and use case models describe how users will interact with a system. Therefore here in this stem you are defining the functional requirement of the project. Incorrect Answers: A: Technical requirements and design specifications and coding specifications describe how the system will interact, conditions under which the system will operate and the information criteria the system should meet. B: Business requirement, Functional requirement, and Technical requirement come under project requirement. In this stem it is particular defining the functional requirement, hence this is not the best answer. D: Business requirements contain descriptions of what a system should do.