Which of the Following Actions Will Enable Logging Via Calls

Multiple Choice

Which of the following actions will enable logging via calls to debugData( ) on a native Magento payment method model?

A) Set the protected property $_debug of the payment model to true
B) Set the config node default/payment/debug/[method  code] to 1
C) Call Mage:: register ('payment_method_debug_' . [method code], true) ;
D) Set the config node default/payment/ [method code]/debug to 1
E) Call setDebug(true) on the payment method model