Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
you may cancel your order or pre-order of physical goods at any time prior to dispatch and order acceptance . 

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