Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
9.6 if a guest suffers a travel issue pursuant to the guest refund policy , airbnb may determine , in its sole discretion , to refund the guest part or all of the total fees in accordance with the guest refund policy . 

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