Determine Whether the Function Below Has Any Horizontal Asymptotes $f ( x ) = \frac { e ^ { x } - e ^ { - x } } { 2 }$

Multiple Choice

Determine whether the function below has any horizontal asymptotes. $f ( x ) = \frac { e ^ { x } - e ^ { - x } } { 2 }$

A) horizontal asymptotes: y = 0 and y = 2
B) no horizontal asymptotes
C) horizontal asymptotes: y = 1
D) horizontal asymptotes: y = 1 and y = 3
E) horizontal asymptotes: y = 3