How is the tone of the fourth sentence inconsistent with the tone of the passage?

Mario is reading a book where the narrator only describes the point of view of pip, one of the characters. m and feelings. which type of narrator does this describe?

In this paragraph the author uses a real life example to demonstrate how do cryptography a. can the government. b. can be dangerous. c. is a swiss specialty d. is unreasonable expensive

How do the historical details in this passage support the authors' claim?