Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
we reserve all rights not expressly set forth in these terms . 

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