28.14 If any positive number is rounded to two, three, and four decimal places respectively, the resulting numbers are $a, b, c$, then
(A) $a \geqslant b \geqslant c$.
(B) $a \leqslant b \leqslant c$.
(C) $a \geqslant b \geqslant c$ or $a \leqslant b \leqslant c$.
(D) None of the above conclusions are correct.
(3rd "Five Sheep Cup" Junior High School Mathematics Competition, 1991)
［Solution］Consider the number 0.01949, when rounded to two, three, and four decimal places, the results are
$$
a=0.02, \quad b=0.019, \quad c=0.0195 .
$$

Clearly, (A), (B), and (C) are all incorrect.
Therefore, the answer is $(D)$.