[单项选择]

{{B}}TEXT E{{/B}}

{{B}}The Pony Express{{/B}}

In the United States today, we can send a letter from coast to coast in just a few days for well under half dollar. But news did not always travel as fast or as cheaply as it does today, In the mid 1800s, trains and horse-drawn coaches carded mail. It took many weeks for news to travel from Now York to California.
In 1860, the railroad and telegraph reached only from the East Coast to Missouri, less than halfway across the coun try. Horse-drawn coaches, which were very slow, then carried the mail from Missouri to California, In April 1860, the Pony Express began to carry the mail from St. Joseph, Missouri, to Sacramento, California. The trip took just ten days -- half the time the coaches took.
The Pony Express was a horse relay system. There were stations every 10 or 15 miles along the route, which was nearly 3,200 kilometers’(2,000 miles) long.
A. 61 yeah,
B. 6 months,
C. One year.
D. 18 months.