Gelman's "One-One Principle" of Counting States That ______

Gelman's "one-one principle" of counting states that ______.

A) "count words" assigned to each item must be chosen in a repeatable order
B) when counting an array,the final "count word" used represents the number of items in the set
C) each item in a set gets only one distinct "count word" assigned to it
D) any group of items may be counted