In what year range was the National (Cumberland) Road built?

The National (Cumberland) Road was constructed during the period from 1811 to 1852. This road was significant as it was the first federally funded road in the United States, reflecting the government's commitment to facilitate westward expansion and improve transportation across the growing nation. Construction began in 1811, connecting the Potomac and Ohio Rivers, and the project continued for several decades to extend further into the western territories.

The first option covers a time frame that begins before the road's construction initiated. The third option falls even earlier and does not overlap at all with the actual building of the road. The fourth option concludes the timeline too early, missing significant years of construction. Thus, the timeframe in option B accurately captures the full span of the National Road's development, highlighting its role in early American transportation infrastructure and westward migration.