Read the excerpt from The Code Book. Despite the enormous strength of RSA and other modern ciphers, cryptanalysts are still able to play a valuable role in intelligence gathering. Their success is demonstrated by the fact that cryptanalysts are in greater demand than ever before—the NSA is still the world's largest employer of mathematicians.

What is the central idea of this paragraph?

Many math experts work for the National Security Agency.
The RSA computer system makes our country more secure.
Skilled people are still important national security workers.
Computers are better than people at keeping the nation safe.

Ineed . (1) chimpanzees, skillful tool-users, use several objects found in their environment as tools. (2) first of all, they use sticks. (3) they have been seen inserting carefully trimmed sticks into termite mounds and then withdrawing the sticks and eating the termites that cling to them; they also are known to use sticks to steal honey from beehives. (4) in addition, chimps use leaves in a variety of ingenious ways. (5) for example, they have been seen rolling leaves into cones to use as drinking cups, dampening them and using them to clean their bodies, and chewing them until they can serve as sponges. (6) finally, chimpanzees have been observed using stones to crack open nuts. 1. in general, the major details of this paragraph are a. ways chimpanzees learn to use objects as tools. b. reasons chimpanzees use objects as tools. c. examples of objects that chimpanzees use as tools. d. ingenious ways that chimpanzees use leaves.

Read the excerpt from dominique’s personal narrative. tired of waiting for the bus, which was late for the fifth day in a row, i sat leafing through an old magazine i had stuffed in my purse the previous night. it was terribly warm for a september afternoon, and the sun cast fleeting shadows on the bus stop sign with each car that passed. i wondered when the weather would get cooler and when the new bus driver would start arriving on time. it was about then that i first noticed the apparent agitation of the man sitting next to me. finally, the bus arrived and ambled to a gradual stop directly in front of the restless man. the doors widened, and the bus driver greeted the man with his usual banter in his usual monotone. "good afternoon. how are you today? ” when writing the next few lines of dialogue, dominique should be certain that the lines provide clues about what will happen later on in the narrative. contain made-up details that make the story more exciting. include everyday language that seems real and natural. use precise words that make both men sound educated.

Which statement best explains how the setting affects the meaning of the story? a. the water and wave motif conveys the queasy feeling the narrator has when walking alone at night. b. the firefly light conveys a feeling of nostalgia for long summer evenings spent with family. c. the phrase whispering and murmurs" suggests that the main character has fits of madness. d. the comparison of the street to a graveyard suggests that something is terribly wrong with society.