Answer:
Because Qin Shihuang unified seven states and made them into one big EMPIRE. Before his unification, each state had their own law, their own writing, measurement system, etc. To firm his empire, then there could be only ONE system.
Explanation:
To make one standard system, it has to begin with the common written language
C. Different levels of government supply different services and they all must be paid for by taxes.
The document assured all English citizens freedom of speech (A) I think
Andrew jackson was a major general in the war of 1812