Express the Sum Using Summation Notation $\sum _ { k = 2 } ^ { 4 } k ( k - 7 )$

Multiple Choice

Express the sum using summation notation.
- $\sum _ { k = 2 } ^ { 4 } k ( k - 7 )$

A) $- 3$
B) $- 40$
C) $- 22$
D) $- 34$