How many years did it take to build the National Road?

The National Road was built between 1811 and 1837. It is a 620 mile road which connected Potomac and the Ohio Rivers. It was improved in the 1830's and became the  second U.S. road surfaced with the macadam process pioneered by Scotsman John Loudon McAdam.

So therefore, it took 26 years to build

Explanation:

with my knoladg i would say it was c

the hyksos invasion. the hyksos were able to attack egypt successfully because of their skills in using bronze weapons, composite bows and the use of the horse and chariot during the invasion. although the egyptians depict a barbarian-type overthrow, the truth is the seizure was likely a relatively peaceful one.