In the movie Homeless to Harvard:The Liz Murray Story, When an audience asked Liz: “Liz ,how did you do this?”She said:“ How could I not do it? My parents show me what the alternative was.” She means___. ( )

A、Her parents showed her how to succeed
B、Her parents showed her what the life was like if she is not successful
C、Her parents showed her what the life of successful people was like
D、Her parents showed her they could never succeed