The phrase 'get rid of' is directly related to the concept of elimination or removal, as indicated by the knowledge point 'get rid of：除掉；去掉；摆脱'. This makes option A the correct answer. Options B, C, and D, while related to other concepts mentioned in the knowledge points, do not accurately describe the meaning of 'get rid of'. B relates to managing, C to accountability, and D to the potential negative outcomes of liberal education, none of which align with the direct meaning of 'get rid of'.