Question:Which of the following will get information ('customer_referrer_id') from a currently logged-in admin user? 

A $collection->addAttributeToFilter('customer_referrer_id', $referrer_id); $referrer_id = Mage::getSingleton('admin/session')->getUser()->getId(); 
B $collection->addAttributeToSelection('customer_referrer_id', $referrer_id); $referrer_id = Mage::getSingleton('admin/session')->getUser()->getId(); 
C $collection->addAttributeToFilter('customer_referrer_id', $referrer_id); $referrer_id = getSingleton('admin/session')->getUser()->getId(); 
D None 

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A 

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Mohammad Towhidul Islam

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