The correct response is:
d. Both the Qin and Han had a strong central government, but the Han used a civil service system and the Qin did not.
This option accurately reflects the similarities and differences between the two dynasties regarding governance and administration. The Qin dynasty (221-206 BCE) implemented a strict legalist approach with heavy centralization and did not have a civil service system, while the Han dynasty (206 BCE-220 CE) adopted confucian ideals and established a civil service system to recruit and promote officials based on merit.