单选题：______should be first considered when a real-time operating syst

______should be first considered when a real-time operating system is designed.@[B](1)
A. Reliability and flexibility
B. Responsiveness and reliability
C. Flexibility and performance optimization
D. Efficiency and flexibility



A.Reliability and flexibility
B.Responsiveness and reliability
C.Flexibility and performance optimization
D.Efficiency and flexibility


答案：B