When should a project baseline be changed

A) When a major delay occurs.
B) When an official change is made.
C) When a cost increase occurs.
D) Changes should never be made in the baseline.

以下能够正确退出循环的是( )。

A．i=10
Do
i=i+1
Loop Until i＜10

B．i=1
Do
i=i+1
Loop Until i=10

C．i=10
Do
i=i+1
Loop Until i＞0

D．i=1
Do
i=i-3
Loop Until i=0