Two Professional Football Scouts (Sc)are in the Process of Recruiting

Two professional football scouts (Sc) are in the process of recruiting 7 new football players (receivers) .After a careful review and evaluation,both scouts ranked the seven receivers in terms of their professional career prospects.The rankings are given below. $$\begin{array} { c c c } \begin{array} { c } \text { Player } \\\text { (Receiver) }\end{array} & \text { Rankings of Sc. 1 } & \text { Rankings of Sc. 2 } \\1 & 3 & 3 \\2 & 2 & 1 \\3 & 1 & 2 \\4 & 4 & 6 \\5 & 5 & 4 \\6 & 7 & 7 \\7 & 6 & 5\end{array}$$
What is the value of d_i²?

A) 0
B) 2
C) 6
D) 8
E) 10