Explanation: 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.