Which of the following elements are common to Gothic cathedrals?

A. post-and-lintel structure and fresco paintings

B. triumphal arches and hemispherical domes

C. sculpted portals and stained-glass windows

D. Ionic columns and undecorated pediments

c

Explanation:

Stained-glass windows were an important feature of churches built in the Gothic style, which first arose in the mid-1100's. The windows filled the church interiors with light and color, delighting worshipers with their beauty. The windows were not only beautiful; they also served an educational purpose.

I think b is a good answer