Find the Angle θ Between the Vectors $\begin{array} { l } \mathbf { u } = - 7 \mathbf { i } - 8 \mathbf { j } \\\mathbf { v } = - 9 \mathbf { i } + 2 \mathbf { j }\end{array}$

Multiple Choice

Find the angle θ between the vectors. ​​ $\begin{array} { l } \mathbf { u } = - 7 \mathbf { i } - 8 \mathbf { j } \\\mathbf { v } = - 9 \mathbf { i } + 2 \mathbf { j }\end{array}$ ​
(Round the answer to 2 decimal places. )
​

A) $71.34 ^ { \circ }$
B) $66.34 ^ { \circ }$
C) $61.34 ^ { \circ }$
D) $81.34 ^ { \circ }$
E) $76.34 ^ { \circ }$