This is an example of stained glass. The test taker can identify this as the glass decorations are colored to produce depictions of Religious figures and designs.

An apse is a recess in a church where the altar often is; an oculus is not related to glass work, but related to church construction.

Tapestries and mosaics are of different mediums than glass: cloth and tile, respectively.

Image is in the public domain, accessed through Wikipedia Media Commons: https://commons.wikimedia.org/wiki/File:Chartres\_-\_cath%C3%A9drale\_-\_rosace\_nord.jpg

This is the Hagia Sophia. It is located in Istanbul, on the Black Sea, in Turkey. There are hints of the location of the work in the style of the building. Consider the domed top, mixed with the towers on the corner. It is a unique blending of Greek and Islamic artistic influence.

Image adapted from http://www.publicdomainpictures.net/hledej.php?hleda=hagia+sophia+5.