Perform the Operations and Simplify $\left( 7 x ^ { 3 } - 5 x ^ { 2 } \right) + \left( 7 x ^ { 3 } - 5 x \right)$

Multiple Choice

Perform the operations and simplify. $\left( 7 x ^ { 3 } - 5 x ^ { 2 } \right) + \left( 7 x ^ { 3 } - 5 x \right)$

A) $14 x ^ { 3 } - 5 x ^ { 2 }- 5 x ^ { 3 }$
B) $4 x ^ { 3 }$
C) 0
D) $14 x ^ { 3 } - 5 x ^ { 2 }- 5 x$