请选择ABCD1?,M8W.`9]2a4`.e;]9e;a I think you’ve got to the point _________ a change is needed，otherwise you’ll fail.'|6},c/J;r*Z*}/C
A.when'|6},c/J;r*Z*}/C
B.that'|6},c/J;r*Z*}/C
C.where'|6},c/J;r*Z*}/C
D.which'|6},c/J;r*Z*}/C