Please give me the correct answer. Only answer if you're very good at English. Please don't put a link to a website. Choose the MAIN text structure for this paragraph.

Cause and Effect

Compare and Contrast

Problem and Solution

Main Idea and Supporting Details​

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.