Find the Angle Between the Pair of Vectors to the Nearest

Multiple Choice

Find the angle between the pair of vectors to the nearest tenth of a degree.
- $$\langle 9 , - 9 \rangle , \langle 10 , - 4 \rangle$$

A) $11.6 ^ { \circ }$
B) $1.6 ^ { \circ }$
C) $23.2 ^ { \circ }$
D) $33.2 ^ { \circ }$