For each action we perform, we can know only some of its consequences. Thus the view that in no situation can we know what action is morally right would be true if an action' s being morally right were the same as the action' s having the best consequences. The conclusion follows logically if which one of the following is assumed? ['Knowing that an action has the best consequences requires knowing all the consequences of that action.', 'On some occasions we can know what action is morally right.', 'Only the immediate consequences of our actions are relevant in determining whether they are morally right.', 'On some occasions we can come to learn that it is morally wrong to perform a certain action.']