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