Question:Which of the following will check whether the currently logged-in customer ever placed an order at the Magento store? 

A $order = Mage::getModel('sales/order')->getCollection() ->addAttributeToFilter('customer_id',$session->getId()) ->getFirstItem(); if ($orders->getSizeValue()) { } 
B $orders = Mage::getResourceModel('sales/order_collection') ->addFieldToSelect('*') ->addFieldToFilter('entity_id', $customer->getEntityId()); if ($orders->getSize()) { } 
C $orders = Mage::getResourceModel('sales/order_collection') ->addFieldToFilter('customer_id', $customer->getId()); if ($orders->getValue()) { } 
D $orders = Mage::getResourceModel('sales/order_collection') ->addFieldToSelect('*') ->addFieldToFilter('customer_id', $customer->getId()); if ($orders->getSize()) { } 

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D 

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Mohammad Towhidul Islam

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