How Do People with Damage to the Ventromedial Cortex in the Frontal

How do people with damage to the ventromedial cortex in the frontal lobe respond on a gambling card task?

A) They do not understand any rules of the gambling task.
B) They do not shift from risky choices to more advantageous,safe decks as control subjects do.
C) They learn to shift from risky to safe decks,but only after they receive penalties with the risky deck.
D) After they learn how the game works,they finally make the switch to avoid penalties.