From Three O'Clock to Half Past Four: Author's Purpose

Why did the author most likely write this passage?

• A.To get readers to buy a product
• B.To tell a made-up ghost story
• C.To teach readers about how much time has passed between two events

Authors use examples to explain their ideas. Which sentence from the passage gives an example?

• A.For example, if you start your homework at 3:00 PM and finish…
• B.To find elapsed time, you can subtract the start time from the…
• C.Elapsed time tells us how much time has passed between two events.