D because it's the most revelant
Answer:
1956
Explanation:
The Federal-Aid Highway Act of 1956. It took several years of wrangling, but a new Federal-Aid Highway Act passed in June 1956. The law authorized the construction of a 41,000-mile network of interstate highways that would span the nation. It also allocated $26 billion to pay for them.
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
