请教：it has come to signify...是什么意思？

quoxo

verbal review sc:
43.     Though the term “graphic design” may suggest laying out corporate brochures andannual reports, they havecome to signify widely ranging work, from packagedesigns and company logotypes tosigns, book jackets, computer graphics, and ?lm titles.

(A)    suggest  laying out corporate brochures andannual reports, they have come to signify widely ranging
(B)     suggest laying outcorporate brochures andannual reports, it has come to signify a wide range of
(C)    suggest corporate  brochure and annual reportlayout, ithas signi?ed widely ranging
(D)    have suggested corporate  brochure and annualreport layout, it has signi?ed awide range of
(E)    have suggested  laying out corporate brochures and annual reports, they have come tosignify widely ranging


答案是B。请教it has come to signify a wide range of ...是什么意思？谢谢！