Which words from the text suggest the importance of the Pony Express? a. Highest development, supreme achievement

b. Brief existence, great national crisis

c. Imperative necessity, operated continuously

d. Physical endurance, physical sacrifice

I think it is c.

The Pony Express was the first rapid transit and the first fast mail line across the continent from the Missouri River to the Pacific Coast. It was a system by means of which messages were carried swiftly on horseback across the plains and deserts, and over the mountains of the far West. It brought the Atlantic coast and the Pacific slope ten days nearer to each other.

It had a brief existence of only sixteen months and was supplanted by the transcontinental telegraph. Yet it was of the greatest importance in binding the East and West together at a time when overland travel was slow and cumbersome, and when a great national crisis made the rapid communication of news between these sections an imperative necessity.

The Pony Express marked the highest development in overland travel prior to the coming of the Pacific railroad, which it preceded nine years. It, in fact, proved the feasibility of a transcontinental road and demonstrated that such a line could be built and operated continuously the year around-a feat that had always been regarded as impossible.

The operation of the Pony Express was a supreme achievement of physical endurance on the part of man and his ever faithful companion, the horse. The history of this organization should be a lasting monument to the physical sacrifice of man and beast in an effort to accomplish something worthwhile. Its history should be an enduring tribute to American courage and American organizing genius.

Which words from the text suggest the importance of the Pony Express?  

Select one:

a. Highest development, supreme achievement

b. Brief existence, great national crisis

c. Imperative necessity, operated continuously

d. Physical endurance, physical sacrifice

a. Highest development, supreme achievement

Explanation:

From this excerpt, the Pony Express is discussed as an important means of message delivery where messages are delivered from one location to the other through horseback. Sometimes the horses would have to cross plains, deserts, and mountains to deliver the message.  

The importance of this Pony Express was succintly described when it was said to mark "the highest development in overland travel prior to the coming of the Pacific railroad..."

a is the indefinite article