Perform the Indicated Operation Below and Simplify If Possible by Combining

Multiple Choice

Perform the indicated operation below and simplify if possible by combining like terms. Write the result in standard form. $\left( y ^ { 2 } - 9 y + 4 \right) + \left( 8 y ^ { 2 } - y + 6 \right)$

A) $- 7 y ^ { 2 } - 8 y + 10$
B) $- 7 y ^ { 2 } - 10 y + 10$
C) $9 y ^ { 2 } - 10 y - 2$
D) $9 y ^ { 2 } - 8 y + 10$
E) $9 y ^ { 2 } - 10 y + 10$