If A, B, C be three sets such that A B = A C and A B = A C, then?

If A, B, C be three sets such that A B = A C and A B = A C, th

1.	If A, B, C be three sets such that A B = A C and A B = A C, then?
A.	A=B
B.	A=C
C.	B=C
D.	A=B=C
Answer» D. A=B=C