Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
the cancellation period will expire after 14 days from the day of the conclusion of the contract . 

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