Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
if you cancel your airbnb account as a host , any confirmed booking ( s ) will be automatically cancelled and your guests will receive a full refund . 

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