Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
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in accordance with the us digital millennium copyright act ( `` dmca '' ) and other applicable laws , we have adopted a policy of terminating , in appropriate circumstances and at our sole discretion , accounts of users who are deemed to be repeat infringers . 

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