Which three of the following will return an instance of…

Which three of the following will return an instance of a resource model? (Choose three)

A.
Mage::getResourceModel( ‘customer/customer1);

B.
Mage::getResourceSingleton(‘customer/customer’);

C.
Mage::getModel(‘customer/customer’)->getResourceModel();

D.
Mage::getResourceModel(‘customer/customer’)->getInstance();

E.
Mage::getModel(‘customer/customer’)->getResource();

F.
Mage:: getRe sour ceModel ‘customer/customer’ )->getRe source ();