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

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

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