The question is testing knowledge of fixed collocations with the word 'achieve'. - The correct answer is C. achieve success, as 'achieve success' is a common fixed collocation. - Option A, achieve goal, is incorrect because while 'achieve' can be used with 'goal', it is not a fixed collocation. - Option B, achieve target, is similar to option A and is not a fixed collocation. - Option D, achieve objective, is also not a fixed collocation, though 'achieve' can be used with 'objective'.