Answer:
Option a is correct.
x=-1 and x=5
Step-by-step explanation:
To find the asymptotes for the rational function:

The vertical asymptotes for this function is to set the denominator equals to 0.
The horizontal asymptotes for this given fucntion is 0.
Denominator of the given function is: 
By definition of asymptotes;

By zero product property:
and 
⇒x = 5 and x= -1
Therefore, the asymptotes for the following function located are: x = -1 and x =5