Which sentences use prepositions correctly? Which sentence use prepositions correctly?
Select one or more:

a. I'm occupied with training the new employees.
b. It's not easy to choose among many alternatives.
C. Corporate accounting regulations are different than ten years ago.

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.