Use the Product-To-Sum Formulas to Rewrite the Product as a Sum

Multiple Choice

Use the product-to-sum formulas to rewrite the product as a sum or difference.​ $$8 \sin 65 ^ { \circ } \cos 25 ^ { \circ }$$ ​

A) ​ $8 \left( \sin 90 ^ { \circ } + \sin 40 ^ { \circ } \right)$
B) ​ $4 \left( \cos 90 ^ { \circ } + \cos 40 ^ { \circ } \right)$
C) ​ $4 \left( \cos 90 ^ { \circ } - \cos 40 ^ { \circ } \right)$
D) ​ $\left( \sin 90 ^ { \circ } + \sin 40 ^ { \circ } \right)$
E) ​ $4 \left( \sin 90 ^ { \circ } + \sin 40 ^ { \circ } \right)$