Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
airbnb reserves the right , in our sole discretion , to limit the number of co-hosts a host may invite for each listing and to limit the number of listings a co-host may manage . 

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