Question

read the passage. the pony express in the gold rush of 1849, some one hundred thousand immigrants were lured to california by the promise of gold. towns and businesses popped up to accommodate the growing population, but a problem remained: how to communicate across the vast reaches of the united states. three businessmen thought they had an answer: faster mail delivery via the pony express, a relay system of horses and riders. the pony express made its first delivery on april 14, 1860. mail from st. joseph, missouri, reached san francisco in just eleven days, rather than a month or more, which was standard for mail delivery at the time. the pony express was a short - lived solution, however. after just eighteen months, it was replaced by a national telegraph wire. what is the main, or central, idea of the passage? the pony express was a chain of horses and riders across the country used to deliver mail. the pony express allowed for faster communication in the rapidly growing united states. on april 14, 1860, the pony express delivered mail from missouri to california in just eleven days.

Explanation:

The passage first sets up the communication problem in the growing US post-1849 Gold Rush, introduces the Pony Express as a faster mail delivery solution, notes its speed compared to standard delivery, and mentions its short lifespan. The first option only describes what the Pony Express was, missing the context of the communication need and its purpose. The third option is just a specific detail about its first delivery. The second option captures the core: the Pony Express addressed the need for faster communication in the expanding US, which ties together the problem, solution, and key function described.

Answer:

The Pony Express allowed for faster communication in the rapidly growing United States.