Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
( c ) your user material does not advertise any product or service or solicit any business . 

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