Let the angle between two non - zero vectors `vec(A)` and `vec(B)` be `120^(@)`and its resultant be `vec( C)`.
A. `C` must be equal to `|vec(A) - vec(B)|`
B. `C` must be less than `|vec(A) - vec(B)|`
C. `C` must be greater than `|vec(A) - vec(B)|`
D. `C` may be equal to `|vec(A) - vec(B)|`