While studying those couples who got divorced and those who stayed married, all the following factors were included EXCEPT ______

A．improving their living conditions
B．working on their problems and strengthening communication
C．changing their own attitude towards mediocre marriages
D．divorce and remarriage

A．the car brake will be activated automatically to prevent an accident
B．a refined version of smelling salt will be sprayed at him
C．the window will be opened to let in fresh air
D．a vibrating alarm will sound to wake him up