The Expression $\Sigma \left( X _ { i } - \bar { X } \right) ^ { 2 }$

Multiple Choice

The expression $\Sigma \left( X _ { i } - \bar { X } \right) ^ { 2 }$
Instructs us to

A) square the sum of the scores.
B) sum the squared scores.
C) sum the squared deviations.
D) square the summed deviations.