Simplify the Polynomial by Combining Like Terms $$3 x ^ { 9 } + 11 x ^ { 4 } + 13 x ^ { 9 } + 3 x ^ { 9 } - 1 x ^ { 4 }$$

Multiple Choice

Simplify the polynomial by combining like terms.
- $$3 x ^ { 9 } + 11 x ^ { 4 } + 13 x ^ { 9 } + 3 x ^ { 9 } - 1 x ^ { 4 }$$

A) $19 x ^ { 9 } + 10 x ^ { 4 }$
B) $29 \mathrm { x } ^ { 9 }$
C) $3 x ^ { 9 } + 11 x ^ { 4 } + 13 x ^ { 9 } + 3 x ^ { 9 } - 1 x ^ { 4 }$
D) $29 x ^ { 9 } + 29 x ^ { 4 }$