Which line from the text best illustrates the "physical endurance" required for the Pony Express? (5 points) A time when overlan
d travel was slow and cumbersome It brought the Atlantic coast and the Pacific slope ten days nearer to each other. It was a system by means of which messages were carried swiftly on horseback. It was of the greatest importance in binding the East and West together.
The correct answer for the question that is being presented above is this one: "A time when overland travel was slow and cumbersome." The line from the text best illustrates the "physical endurance" required for the Pony Express is that <span>A time when overland travel was slow and cumbersome</span>