Write an Expression for the N Th Term of the Sequence

Multiple Choice

Write an expression for the n th term of the sequence $\frac { 8 } { 9 } , \frac { 9 } { 10 } , \frac { 10 } { 11 } , \frac { 11 } { 12 } , \frac { 12 } { 13 } ,....$ Assume that n begins with 1.

A) $a _ { n } = \frac { n + 7 } { n + 8 }$
B) $a _ { n } = \frac { n + 8 } { n + 9 }$
C) $a _ { n } = \frac { ( n + 8 ) ! } { ( n + 9 ) ! }$
D) $a _ { n } = \frac { n + 9 } { n + 10 }$
E) $a _ { n } = \frac { ( n + 7 ) ! } { ( n + 8 ) ! }$