The answer is B transcontinental road. I took the quiz
The transcontinental railroad because it transcends through the cities.
The First Transcontinental Railroad, also called the Great Transcontinental Railroad and Central Union Pacific Railroad line, was a 1,912-mile (3,077 km) continuous railroad line constructed between 1863 and 1869 that connected the existing eastern U.S. rail network at Omaha, Nebraska/Council Bluffs, Iowa with the Pacific coast at the Oakland Long Wharf on San Francisco Bay, California. the train cuts down travel time from six long months to a week. It was the shortest, quickest and cheapest route south.
Before the completion of the Transcontinental Railroad, it was so expensive to travel across the country, it cost almost $1000 to travel at that time, however, after the railroad was completed, the price dropped to $150 dollars.
Transcontinental railroad way was the easiest way to travel from Omaha to Sacramento in 1870.
The transcontinental railroad was the first railroad between Omaha, Nebraska in the east to Sacramento, California in the west built in 1869. Before this railroad was built, people use to travel for days to reach their destination. The united states government considered it seriously in 1840 but it was built after the end of the cold war. It became the most convenient way for people to travel from east to west.