Question

Twain grew up in Hannibal, Missouri, which would later provide the setting for Huckleberry Finn and Tom Sawyer. He apprenticed with a printer. He also worked as a typesetter and contributed articles to his older brother Orion's newspaper. After toiling as a printer in various cities, he became a master riverboat pilot on the Mississippi River, before heading west to join Orion. Along the way he visited a number of Indian reservations. He was a failure at gold mining, so he next turned to journalism. While a reporter, he wrote a humorous story, "The Celebrated Jumping Frog of Calaveras County", which became very popular and brought nationwide attention. His travelogues were also well-received. Twain had found his calling.

Which sentence represents a digression which is not relevant to the point of the passage?
Responses
A Along the way he visited a number of Indian reservations.Along the way he visited a number of Indian reservations.
B He was a failure at gold mining, so he next turned to journalism.He was a failure at gold mining, so he next turned to journalism.
C He also worked as a typesetter and contributed articles to his older brother Orion's newspaper.He also worked as a typesetter and contributed articles to his older brother Orion's newspaper.
D After toiling as a printer in various cities, he became a master riverboat pilot on the Mississippi River, before heading west to join Orion.

Answer 1

A — "Along the way he visited a number of Indian reservations." It's an incidental detail that doesn't advance the passage's focus on Twain's career development leading to journalism and writing.