Determine the Common Ratio, the Fifth, and The $n ^ { t h }$

Multiple Choice

Determine the common ratio, the fifth, and the $n ^ { t h }$ terms of the geometric sequence. $9,9 \sqrt { 3 } , 27,27 \sqrt { 3 } , \dots$

A) $a _ { n } = 9 ( 3 ) ^ { - \cdots }$
B) $a _ { n } = 6 ( \sqrt { 3 } ) ^ { n - 1 }$
C) $a _ { n } = 9 ( \sqrt { 3 } ) ^ { n - 1 }$
D) $a _ { n } = ( \sqrt { 3 } ) ^ { n + 1 }$
E) none