In "The Voyage of the James Caird," why does the author include this sentence about an

unrelated casualty at sea?

They would later learn that a 500-ton steamer had foundered with all hands in the same

hurricane they had just weathered.

to help readers understand how remarkable the success of the voyage was 1

to explain what had happened to the ship the James Caird had left behind

to demonstrate that the size of a boat is unimportant in a storm

to add drama and suspense to her work of narrative nonfiction