Mackenzie is searching for information on the effects of self-driving vehicles on people who live in rural areas. She is unable to find enough material on the topic. Which adjustment can Mackenzie make to improve her research plan?

Revise her timeline for conducting research.
Make her topic narrower in focus.
List possible roadblocks to her research.
Revise her research question to be broader.

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.