Which is the most effective thesis statement? FDR was the greatest president because he had a huge impact on history.
FDR was the greatest president because he served four terms.
FDR was the greatest president because he established unprecedented measures that helped end the Great Depression.
FDR was the greatest president because he brought about many positive changes.

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? a theoretical breakthrough would be a fundamentally new way of finding alice's private key mathematicians have been studying factoring for centuries, and modern factoring techniques are not significantly better than ancient techniques a more recent development is the so-called tempest attack, which aims to detect the electromagnetic signals emitted . . in a computer's display unit if scientists could build a quantum computer, it would be able to perform calculations with . . enormous speed