Find the Angle Between the Vectors $\mathbf { u }$ And $\mathbf { v }$

Multiple Choice

Find the angle between the vectors $\mathbf { u }$ and $\mathbf { v }$ . Express your answer in degrees and round to the nearest tenth of a degree.
$$\mathbf { u } = \langle - 2,6,6 \rangle , \mathbf { v } = \langle - 3,7,7 \rangle$$

A) $44.9 ^ { \circ }$
B) $86.4 ^ { \circ }$
C) $45.1 ^ { \circ }$
D) $90 ^ { \circ }$
E) $3.6 ^ { \circ }$