Find (A) the Dot Product of the Two Vectors and (B)

Find (a) the dot product of the two vectors and (b) the angle between the two vectors. $( - 4,3 )$ and $\{ - 16,12 )$

A) $$100,90 ^ { \circ } 0 ^ { \prime }$$
B) $10,000,180 ^ { \circ } 0 ^ { \prime }$
C) $100,0 ^ { \circ } 0 ^ { \prime }$
D) $100,90 ^ { \circ } 50 ^ { \prime }$
E) $100,180 ^ { \circ } 0 ^ { \prime }$