Read the passage from a letter by Christopher Columbus. The inhabitants . . . are well made, but because they are timid and full of terror. . . . But when they see that they are safe, and all fear is banished, they are very guileless and honest, and very liberal of all they have.

–Letter to Gabriel Sanchez, Christopher Columbus

Which action is the best way to verify the passage from the letter?

Read the rest of the letter.
Examine if the letter is relevant.
Find evidence to corroborate the letter.
Determine if the letter is a primary source.