The number of values that (f(a))2 + (f(b))2 + (f(c))2 can take is
(A) 4 (B) 2
(C) 7 (D) 7
The number of values that (f(a))2 + (f(b))2 + (f(c))2 can take is
(A) 4 (B) 2
(C) 7 (D) 7