Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
some jurisdictions do not allow the exclusion of certain warranties . 

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