Many readers, I suspect, will take the title ... ...

According to the author,
I.   &categorizing is a fundamental activity of people.
II.   &whenever a word refers to a kind of thing, it signifies a category.
III.   &one has to be able to categorize in order to function in our culture.

(A) I only
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Nova Press: Set D - The Three Step Method