Read this sentence from the passage.(please help)

In the United States during the early 1900s, most people thought of automobiles as a passing fad.

How does this sentence support the author's purpose in writing the passage?

A.
It points out how Jackson and Crocker's attitudes changed during their trans-U. S. automobile trip.
B.
It condemns the narrow-minded attitudes prevalent in the United States in the early twentieth century.
C.
It explains why no one had attempted a long-distance automobile trip before Jackson and Crocker.
D.
It suggests that most U. S. citizens were violently opposed to Jackson and Crocker's road trip.