Ethicist: Only when we know a lot about the events that led to an action ... ...

Ethicist: Only when we know a lot about the events that led to an action are we justified in praising or blaming a person for that action—as we sometimes are. We must therefore reject Tolstoy’s rash claim that if we knew a lot about the events leading up to any action, we would cease to regard that action as freely performed. Which one of the following, if assumed, enables the conclusion of the ethicist’s argument to be properly drawn?
(A) People should not be regarded as subject to praise or blame for actions that were caused by conditions beyond their control.
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Dec 2012 LSAT (PT68): Logical Reasoning A