Adam writes this sentence in his analysis of The Code Book.

The Code Book contains many specialized terms.

Which line from the book best supports his analysis?

Codebreakers continue to use old-fashioned techniques
This would allow Eve to intercept the message as it is typed into the computer
Eve's task is made considerably easier if Alice sends her invitations by e-mail
The Trojan horse is a brand-new piece of encryption software that seems secure

Codebreakers continue to use old-fashioned techniques