Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
if you choose to use the airbnb platform or collective content , you do so voluntarily and at your sole risk . 

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