D) None of the options. A) Tmeracten perspectent the system, the is: B) Structural perspective. C) External perspective. D) Behavioral environment? A) Activity diagrams. B) Use case diagrams. C) Sequence diagrams. D) Class diagrams. 8. Which one of the following is a software engineering challenge? A) Coping with increasing diversity. B) demands for reduced delivery times. C) developing trustworthy software. D) All options