Respuesta :

so answers B and C are correct, but D isn't 
and just thinking about it B can't be correct either because it has a point on a line and letter A i constructed a new red plane that also have AU thus AU is not unique so im goining with (C)
AL2006
'B' and 'D' are correct.
'C' isn't, and we don't know about 'A' because you left it out.