单选题：Which of following operations will make a process change from us

Which of following operations will make a process change from user mode to kernel mode? @[B](1)

I Divide by zero II Call sin() function III system call read

A. Only I and II
B. Only II and III
C. Only I and III
D. I, II and III





A.Only I and II
B.Only II and III
C.Only I and III
D.I, II and III


答案：B