How long is Dr. Patterson's lunch break?

• A. 30 minutes
• B. 45 minutes
• C. 60 minutes
• D. 90 minutes

Answer: (B)

When a question asks for how long something lasts, the key idea is to look for an exact duration stated in the text or to subtract the start time from the end time. If the passage says Dr. Patterson's lunch break lasts 45 minutes, that is the answer because it’s the explicit duration given. You can see why by thinking of a simple clock difference: if lunch starts at 12:15 and ends at 1:00, the time between those moments is 45 minutes. Any other length would rely on information not provided, so the stated 45 minutes is the supported duration.