For real a, b, c if a2 + b2 + c2 = ab + bc + ca, the value ofa + c is b

For real a, b, c if a2 + b2 + c2 = ab + bc + ca, the value ofa + c is

1.	For real a, b, c if a2 + b2 + c2 = ab + bc + ca, the value ofa + c is b
A.	3
B.	1
C.	2
D.	0
Answer» D. 0