Subtract
-Subtract $\left( 3.5 x ^ { 2 } - x - 9.4 \right)$

Multiple Choice

Subtract.
-Subtract $\left( 3.5 x ^ { 2 } - x - 9.4 \right)$ from the sum of $\left( 1.7 x ^ { 3 } + 7.8 x ^ { 2 } + 4.7 \right)$ and $( 6.9 x - 2.8 )$ .

A) $1.7 x ^ { 3 } + 4.3 x ^ { 2 } + 6.9 x + 11.3$
B) $13.9 x ^ { 6 } + 11.3$
C) $1.7 x ^ { 3 } + 4.3 x ^ { 2 } + 7.9 x + 11.3$
D) $1.7 x ^ { 3 } + 11.3 x ^ { 2 } + 5.9 x - 7.5$