Simplify the Polynomial by Combining Like Terms $13 y ^ { 2 } + 6 y ^ { 2 }$

Multiple Choice

Simplify the polynomial by combining like terms.
- $13 y ^ { 2 } + 6 y ^ { 2 }$

A) $19 y ^ { 4 }$
B) $19 y ^ { 2 }$
C) $13 y ^ { 2 } + 6 y ^ { 2 }$
D) $7 y ^ { 2 }$