Answer:
The answer is: incorrect
Step-by-step explanation:
The correct answer is: No te importan las decisiones. Why? Well, in this case, the subject is "las decisiones" --the decisions, and the verb needs to be in concordance with the subject, and as it is in the plural form, we have to add the n at the end of this verb. This is how this subject is conjugated:
- A mí no me importan
 - A ti no te importan 
 - A nosotros no nos importan
 - A usted no le importa
 
- A él no le importa
 - A ella no le importa 
 
- A ustedes no les importan
 
... las decisiones.