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

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

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::getResourceModel (‘customer/customer’) ->getResource( );