Answer:
C. the Gupta Empire
Step-by-step explanation:
The Gupta Empire is the empire that is shown in the grey area in the map shown, the Gupta Empire in its maximum power covered that whole area and was around the 450 CE it was the main empire in the indian sub-continent in those years, the Gupta empire eventhough had those borders the main concentration of population was located at the eastern part of the empire.