The correct option is this: THE EMPHASIS ON INDIVIDUAL CHOICE. The novel centers around the selfishness and greediness of men, which is shown in the choices they make on a daily basis. Tom Walker made a greed choice of selling out to the devil in order to obtain riches and his selfishness shows in his relationships, even with his wife.
One (internal) is from your thoughts or the characters thoughts and the other one (external) is from what is actually happening to or around the character.