Test and analysis: there is no absolute fairness: fairness will always be restricted by certain social conditions, and there will be some unfair phenomena in any society. Fairness is always relative, and no matter how hard we try, it is impossible to achieve absolute fairness. Nevertheless, we still need to make unremitting efforts to create a fairer society. So statement a is not true. C is wrong. D statement is absolutely incorrect. So the answer is B.