Find the Nth Term $a _ { n }$ Of a Sequence Whose First Four Terms Are Given

Multiple Choice

Find the nth term $a _ { n }$ of a sequence whose first four terms are given.
- $$- \frac { 6 } { 12 } , - \frac { 7 } { 24 } , - \frac { 8 } { 36 } , - \frac { 9 } { 48 } , \ldots$$

A) $a _ { n } = \frac { n - 7 } { 12 n }$
B) $a _ { n } = \frac { n + 5 } { 12 n }$
C) $a _ { n } = - \frac { n + 5 } { 12 n }$
D) $a _ { n } = \frac { 7 - n } { 12 n }$