Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
9.1 hosts and guests are responsible for any modifications to a booking that they make via the airbnb platform or direct airbnb customer service to make ( `` booking modifications '' ) , and agree to pay any additional listing fees , host fees or guest fees and/or taxes associated with such booking modifications . 

```
. OPTIONS: ['Choice of law' 'Arbitration' 'Limitation of liability' 'None'
 'Jurisdiction' 'Unilateral termination' 'Unilateral change'
 'Content removal' 'Contract by using'].