What's the source or answer choices?
Answer:
26 years
Explanation:
The National Road (also known as the Cumberland Road) was the federal government's first significant improved highway in the United States. The 620-mile (1,000-kilometer) road, built between 1811 and 1837, connected the Potomac and Ohio Rivers and served as a major transportation route for thousands of migrants heading west.
World leaders can go by many titles: premier, chancellor, dear respected comrade. But two of the most common are president and prime minister. What differentiates them other than the latter’s hint of continental flavor?
