Which sentence should not be included in an informative essay about the dangers of skateboarding? a) avoid risky moves or jumps if you are not experienced. b) i have seen skateboarders and i don't think they follow safety rules. c) it is important to wear a helmet that fits well to avoid head injuries. d) a 1998 medical study listed skateboarding as the most risky of the skating sports.

How does this excerpt develop the central idea that espionage during the civil war was often carried out by untrained citizens? it enhances the reader’s understanding by explaining why training was unnecessary. it changes the reader’s perception of what information a spy was able to obtain. it explains an ordinary person’s motivation for conducting espionage against the enemy. it adds moral complexity to espionage, due to the use of secret and dangerous methods.