【单选题】
A <{p}>They must be granted access to these websites.<{br/}><{/p}>
B <{p}>They must read the profiles of other members.<{br/}><{/p}>
C <{p}>They must socialize with other members.<{br/}><{/p}>
D <{p}>They must share some common interests.<{br/}><{/p}>
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