Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
hosts acknowledge that reviews and ratings from guests for their listing ( s ) may be impacted by a co-host 's conduct and performance . 

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