The answer is The Pony Express was invaluable during the national crisis.
Pony Express started in the 1800s when three men had put up a mail delivery system that would reach from Midwest to California. The design of the system connected a number of over one hundred stations, each almost two hundred forty miles long, across the country. It had given a needed service but it was never quite the financial success it was envisioned to be.
Answer:
Main idea of the text:
Gasoline, diesel, and biodiesel can all be used to run an automobile, however, they are comprised of different substances and can't be used interchangeably to power every automobile.
An appropriate title:
Understanding How Gasoline, Diesel, and Biodiesel differentiate.
Explanation:
The passage contains several key points to understand.
One being the types of fuel, the second being <em>how</em> they power an automobile. Additionally, their flammability, what they are made out of, and how you shouldn't use them interchangeably are all stated. The main idea is the combination of these key points to portray the specific conclusion gathered from the passage.
The answer would be C. The antagonist in a story is the “bad guy”
When you preview something, you inspect it. Previewing helps you get a glimpse of what's ahead before you read or something, kind of like skimming.