17. Every painting hanging in the Hoular Gallery is by a French painter. No painting in the Hoular Gallery is by a Vorticist. Only Vorticists use acrylic monochromes in their works.

If the information above is true, which of the following must also be true?

(A) No French painters are Vorticists.

(B) All Vorticists use acrylic monochromes in their works.

(C) Some French painters do not use acrylic monochromes in their works.

(D) No French painters use acrylic monochromes in their works.（C）

(E) All French painters who use acrylics use acrylic monochromes in their works.

这个C怎么推出来的呢？指教！

H Gallery paining ---> French painter

No H Gallery paining ----> Vorticist ---> acrylic monochromes, then?

原文： H画廊里的每幅画都是法国人画的，都不是V类画家画的。只有V类画家用a.m.技术。

原文直接推理得：H画廊里的每幅画都没有用a.m.技术。

选项C进了一步：有些法国画家（即H画廊里的那帮）不用a.m.技术。