Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
third-party shopping services are offered by third parties at the sole responsibility of third parties . 

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