36 . 18 If person A's height or weight is greater than person B's in at least one aspect, then we say A is not inferior to B. Among 100 young men, if someone is not inferior to the other 99, he is called a great young man. Then, the maximum number of great young men among the 100 young men could be
(A) 1.
(B) 2.
(C) 50.
(D) 100.
(China High School Mathematics League, 1995)
[Solution] Take 100 young men as a special case, where their heights and weights are all different, and the tallest is also the lightest, the second tallest is also the second lightest, $\cdots$, the $k$-th tallest is also the $k$-th lightest $(k=1,2, \cdots, 100)$. Clearly, these 100 young men are all good young men.
Therefore, the answer is $(D)$.