Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
arbitrators must be neutral and no party may unilaterally select an arbitrator ; 

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