Simplify the Polynomial by Combining Like Terms $$\left( 7 x ^ { 6 } + 9 x ^ { 5 } + 4 x \right) + \left( 4 x ^ { 6 } - 3 x ^ { 5 } + 5 x \right)$$

Multiple Choice

Simplify the polynomial by combining like terms.
- $$\left( 7 x ^ { 6 } + 9 x ^ { 5 } + 4 x \right) + \left( 4 x ^ { 6 } - 3 x ^ { 5 } + 5 x \right)$$

A) $11 x ^ { 6 } + 6 x ^ { 5 } + 9 x$
B) $26 \mathrm { x } ^ { 12 }$
C) $8 x ^ { 6 } + 4 x ^ { 5 } + 14 x$
D) $11 x + 6 x ^ { 6 } + 9 x ^ { 5 }$