The correct answer is C: for the Muslim merchants and visitors. Originally, there were 12 mosques in the Empire's capital, for the visiting Muslim officials and for the Muslin population of the city, mostly merchants.
I believe the answer in the blank would be “in a different way”
the midday meal: merienda de mediodía
mexicans with a blend of indigenous and spanish heritage:mestizo
a style of traditional mexican music: mariachi
mesoamerican version of corn: maize