(阅读)关于定义类题目的疑问(明天考了,请大家一定告诉我方法呀!)

这是0408的一条阅读题,我把选项所在的行次HIGHLIGHT起来了,请大家帮忙看看.因为我做TERM这类题目老出错,却错的不明不白,考试时肯定会有这类题的，请大家帮帮忙!

24. Which of the following terms is NOT defined in the passage?
(A) "print" (line I)
(B) "impressions" (line 8)
(C) "multiples" (line 12)
(D) "edition" (line 12)
答案选C,可我觉得C不是有个REFER TO 吗?所以我选了B

The term "print" has several meanings, so it is important to understand exactly what is
meant by the artistic terminology. A print in the artistic sense is not a reproduction of a
work of art done in some other medium, such as painting or drawing. That can in no sense
be considered a work of art, since the artist had no involvement with it. A print is an original
work of art created by an indirect method. Instead of making an image directly on a surface,
as in drawing or painting, the artist works on a master surface, which may be a sheet of
metal, a block of stone, wood, plastic, or linoleum. From this master surface, numerous
impressions may be made by inking the surface, laying a sheet of paper on it, and then
subjecting both surface and paper to pressure, generally by means of a printing press.
A print may exist in several versions. Sometimes the printmaker alters the image between
impressions, so that each print is slightly different from the others. Any series of such prints
is referred to as multiples. The number of impressions (known as the edition) that are
possible from a single original varies with the material. Prints made from linoleum, which
wears readily, will be fewer than those made from a metal plate, which is capable of striking
fine-quality prints in the thousands. .........

multiple is used to explain, so itself hasn't been defined.

good luck! You will make it!