Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
in addition , hosts may instruct a co-host to provide certain one-time services in relation to their listing . 

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