Columnist: The relief from the drudgery of physical labor that much modern technology affords its users renders them dependent on this technology, and, more importantly, on the elaborate energy systems required to run it. This leads to a loss of self-sufficiency. Clearly, then, in addition to undermining life' s charm, much modern technology diminishes the overall well-being of its users. Which one of the following is an assumption required by the columnist's argument? ["Anything causing a loss in life's charm is unjustifiable unless this loss is compensated by some gain.", 'Physical labor is essential to a fulfilling life.', 'People are not free if they must depend on anything other than their own capacities.', "Self-sufficiency contributes to a person's wellbeing."]