An experiment was done in which human subjects recognize a pattern within a matrix of abstract designs and then select another design that completes that pattern. The results of the experiment were surprising. The lowest expenditure of energy in neurons in the brain was found in those subjects who performed most successfully in the experiments. Which of the following hypotheses best accounts for the findings of the experiment? ["The energy expenditure of the subjects' brains increases when a design that completes the initially recognized pattern is determined.", 'Those who performed best in the experiment experienced more satisfaction when working with abstract patterns than did those who performed less well.', 'The task of completing a given design is more capably performed by athletes, whose energy expenditure is lower when they are at rest.', 'People who are better at abstract pattern recognition have more energy-efficient neural connections.']