If Vectors $\overrightarrow { \mathrm { A } }$ And $\vec { B }$

Multiple Choice

If vectors $\overrightarrow { \mathrm { A } }$ and $\vec { B }$ have magnitudes 12 and 15,respectively,and the angle between the two when they are drawn starting from the same point is 110 $\degree$ ,what is the scalar product of these two vectors?

A) -76
B) -62
C) -90
D) -47
E) -170