Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
renewals : subject to the terms hereof , you may choose to renew your subscription at the end of the subscription period . 

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