At the start of this section of the novel, why is the amount of food that Hà and her family are allowed to eat limited? They have very little money because they had to pay a great deal in order to escape from Vietnam. The family is on board a boat with limited supplies, and it is not certain when they will be rescued. They are about to leave Vietnam and must bring as much food as possible with them when they go. The family has been arrested by the North Vietnamese army, and they are being held in prison.

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