Perform the Indicated Operations $$\left( 1.8 x ^ { 3 } + 7.9 x ^ { 2 } + 4.1 \right) + ( 6.3 x - 2.9 ) - \left( 3.6 x ^ { 2 } - x - 9.9 \right)$$

Multiple Choice

Perform the indicated operations.
- $$\left( 1.8 x ^ { 3 } + 7.9 x ^ { 2 } + 4.1 \right) + ( 6.3 x - 2.9 ) - \left( 3.6 x ^ { 2 } - x - 9.9 \right)$$

A) $1.8 x ^ { 3 } + 11.5 x ^ { 2 } + 5.3 x - 8.7$
B) $13.4 x ^ { 6 } + 11.1$
C) $1.8 x ^ { 3 } + 4.3 x ^ { 2 } + 7.3 x + 11.1$
D) $1.8 x ^ { 3 } + 4.3 x ^ { 2 } + 6.3 x + 11.1$