Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
7.1.7 airbnb recommends that hosts obtain appropriate insurance for their host services . 

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