Final answer:
The correct answer is C) Qibla; this wall in a mosque contains the mihrab and is oriented towards Mecca.
Step-by-step explanation:
The wall in a mosque where the mihrab is set, oriented to Mecca, is known as the C) qibla wall.
The mihrab is a semicircular niche that indicates the direction of Mecca, which Muslims face during prayer. The qibla wall, with attractions like the mihrab and minbar, is typically the most ornately decorated part of a mosque.
It's common for the mihrab to be encompassed by elaborate architectural features such as horseshoe arches, gold tesserae, and intricate calligraphic bands, emphasizing its importance.