Simplify

Question

I am using parenthesis to separate , if i write the whole prob as is, it runs together

a + 9 (3a - 18)
_____ ________
36 - a^2 (3a + 27)

possible answers i can choose from

1
____
a + 6

1
____
a - 6

- 1
____
a - 6

- 1
___
a + 6

I am thinking it is

- 1
___
a + 6

but I am not for sure.

Ahh lol never mind, I finally figured it out.. Thanks for the help though:)