Add or Subtract as Indicated $$\left( 3 n ^ { 4 } + 1 \right) + \left( - 8 n ^ { 4 } + 3 \right) - \left( - 8 n ^ { 4 } + 2 \right)$$

Multiple Choice

Add or subtract as indicated. Write the answer in descending order. $$\left( 3 n ^ { 4 } + 1 \right) + \left( - 8 n ^ { 4 } + 3 \right) - \left( - 8 n ^ { 4 } + 2 \right)$$

A) $3 n ^ { 4 } + 6$
B) $- 13 n ^ { 4 } + 6$
C) $3 n ^ { 4 } + 2$
D) $19 n ^ { 4 } - 4$