Find the Indicated Term of the Sequence $$\begin{array} { l } a _ { n } = ( - 1 ) ^ { n } ( 6 n - 5 ) \\a _ { 15 } =\end{array}$$

Find the indicated term of the sequence.​ $$\begin{array} { l } a _ { n } = ( - 1 ) ^ { n } ( 6 n - 5 ) \\a _ { 15 } =\end{array}$$ ​

A) 85
B) -92
C) -85
D) -84
E) 95