Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
9.5 in certain circumstances , airbnb may decide , in its sole discretion , that it is necessary to cancel a confirmed booking and make appropriate refund and payout decisions . 

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