From Three O'Clock to Half Past Four: Order of Ideas

Which of these ideas comes first in the passage?

• A.To find elapsed time, you can subtract the start time from the…
• B.This way, you can keep track of how long things take and…
• C.Elapsed time tells us how much time has passed between two events.

What comes right after this sentence: “For example, if you start your homework at 3:00 PM and finish at 4:30 PM, you can subtract 3:00 from 4:30 to find that 1 hour and 30 minutes have passed.”

• A.This way, you can keep track of how long things take and…
• B.Elapsed time tells us how much time has passed between two events.
• C.To find elapsed time, you can subtract the start time from the…