Write an Expression in Terms of the Given Variable(s)that Represents $q \cdot 3 ^ { n }$

Multiple Choice

Write an expression in terms of the given variable(s) that represents the indicated quantity.
-The amount of bacteria after n minutes if the initial amount of bacteria is q and the amount of bacteria triples every minute.

A) $q \cdot 3 ^ { n }$
B) $q \cdot n ^ { 3 }$
C) $q \cdot 3 ^ { 3 n }$
D) $3 q n$