Answer:
The Muslims empire was advanced in technology, is the right answer.
Step-by-step explanation:
Muslim astronomers during the medieval Islamic period refined and further improved the astrolabe, a Greek invention. An astrolabe is an instrument used to measures the elevation of an astronomical body above the horizon. This instrument was used in astronomical researches as well as for navigation constancies. During the medieval time, it was particularly used as a way of obtaining the Qibla, the direction of Mecca.