Salut! I am currently learning French 2, and based on my knowledge so far, I believe the answer is D) Je ne sais pas si je veux y aller. I hope this helps you! ☺
Bonjour
I am French and PinkLemonadeTae is right ( has to have the best answer )
je ne sais pas si je veux y aller.
y = replaces a place and is always just before the verb
☺☺☺