Tall children can generally reach high shelves easily. Short children

Tall children can generally reach high shelves easily. Short children can generally reach high shelves only with difficulty. It is known that short children are more likely than are tall children to become short adults. Therefore, if short children are taught to reach high shelves easily, the proportion of them who become short adults will decrease.

A reasoning error in the argument is that the argument

(A) attributes a characteristic of an individual member of a group to the group as a whole
(B) presupposes that which is to be proved
(C) refutes a generalization by means of an exceptional case
(D) assumes a causal relationship where only a correlation has been indicated
(E) takes lack of evidence for the existence of a state of affairs as evidence that there can be no such state of affairs