Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
if you do not agree to the change , you may cancel your membership or subscription in your account settings or by emailing help@headspace.com . 

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