Question

One of the author’s purposes in The Code Book is to explain different types of codebreaking to his readers. Which line best demonstrates this purpose?

Answer 1

C) "a more recent development is the so-called tempest attack, which aims to detect the electromagnetic signals emitted . . . in a computer's display unit

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Answer 2

The correct answer to this question is c; a more recent development is the so-called tempest attack, which aims to detect the electromagnetic signals emitted . . . in a computer's display unit.